Named colour

Off-White Industrial Yellow #ffff00

The caution tape that became couture.

Token name suggestion: True Brass

RGB

255, 255, 0

HSL

60°, 100%, 50%

CMYK

0, 0, 100, 0

Luminance

0.9278

#ffff00 is a balanced electric yellow, 60° on the wheel and 25/100 on the cool side. Put black text on it (19.56:1). As text it scores 1.07:1 on white — use #7A7A00 instead. Nearest name is Yellow, nearest Tailwind family is lime.

hsl(60 100% 50%)rgb(255 255 0)Base step 600AAA inkWarm

At a glance

Every number on this page in one read: what #ffff00 is made of, how bright it looks, and which way it leans.

Hex

#ffff00

Hue

60°

yellow

Saturation

100%

electric

Lightness

50%

balanced

Brightness

100%

HSV value

Perceived

94%

weighted brightness

Luminance

0.9278

WCAG relative

Temperature

Warm

25/100 cool

Color family

Yellow

Tone

Electric

Best ink

Black

19.56:1

Closest name

Yellow

ΔE2000 0

Chroma

96.9

LCH, 0–130ish

OKLCH L

0.968

perceptual lightness

Tailwind

lime

500 · ΔE 20.2

Web-safe

#FFFF00

nearest of 216

Where it sits

Hue60° of 360°

Saturation100%

Lightness50%

Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #ffff00.

Temperature

Warm ← → Cool25% cool

Reads warm. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Warmer#FFB900 This color#ffff00 Cooler#A2FF00

Luminance by channel

Red23%

Green77%

Blue0%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

About Off-White Industrial Yellow

Off-White’s industrial yellow, #ffff00 (with black), is streetwear’s conceptual signature — Virgil Abloh’s appropriation of construction caution-yellow, zip-ties and quotation marks that made "irony" a luxury aesthetic.

History

Abloh founded Off-White in 2012, borrowing industrial signifiers — hazard yellow, diagonal stripes, the trademark quotation marks ("SHOELACES") — to interrogate what makes something luxury. The yellow-and-black became high-fashion’s knowing wink.

Psychology

Pure caution-yellow with black reads industrial, urgent and deliberately un-precious — luxury built on irony rather than heritage. The whole point is the tension: warning-label aesthetics on four-figure sneakers.

In design

Pure #ffff00 (1.07:1 — hazard surface) with black diagonals. The appropriation lesson: Off-White took the MOST functional, least luxurious color (safety yellow) and made its very ordinariness the concept — meaning through context, not the hue.

In culture

Quotation-marked "SNEAKERS," the DHL collab (industrial branding as fashion), zip-tie tags: the yellow that made irony wearable.

Brands that own off-white industrial yellow

Caterpillar yellow#ffcd11 Snapchat yellow#fffc00 Hazard yellow#ffff00 DHL yellow (collab!)#ffcc00 Best Buy#fff200

Shades of off-white industrial yellow

Yellow Snapchat yellow Lemon Canary CAT yellow Dandelion Gold Butter

Every format

HEX	#ffff00
HEX (8-digit)	#ffff00ff
RGB	rgb(255, 255, 0)
RGBA	rgba(255, 255, 0, 1)
HSL	hsl(60, 100%, 50%)
HSV / HSB	hsv(60, 100%, 100%)
HWB	hwb(60 0% 0%)
CMYK	cmyk(0%, 0%, 100%, 0%)
LAB	lab(97.1 -21.6 94.5)
LCH	lch(97.1 96.9 102.8)
OKLCH	oklch(0.968 0.211 109.8)
XYZ (D65)	xyz(77.00, 92.78, 13.85)
Decimal	16776960
Display P3	color(display-p3 1.000 1.000 0.000)
Web-safe	#FFFF00

Copy-ready code

every platformclick to select

/* CSS */
color: #ffff00;
background-color: #ffff00;
/* CSS custom property */
--brand: #ffff00;
/* Tailwind (arbitrary) */
class="text-[#ffff00] bg-[#ffff00]"
/* SCSS */
$brand: #ffff00;
/* SwiftUI */
Color(red: 1.000, green: 1.000, blue: 0.000)
/* UIKit */
UIColor(red: 1.000, green: 1.000, blue: 0.000, alpha: 1)
/* Android XML */
<color name="brand">#FFFF00</color>
/* Android Compose */
Color(0xFFFFFF00)
/* Flutter */
Color(0xFFFFFF00)
/* Python / OpenCV (BGR) */
(0, 255, 255)
/* Python / PIL (RGB) */
(255, 255, 0)
/* Java AWT */
new Color(255, 255, 0)
/* .NET */
Color.FromArgb(255, 255, 255, 0)
/* OpenGL / Unity (0–1) */
(1.0000f, 1.0000f, 0.0000f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{255,255,0}

modern cssclick to select

/* mix without leaving CSS */
background: color-mix(in oklab, #ffff00 85%, white);
border-color: color-mix(in oklab, #ffff00 40%, transparent);
/* theme-aware in one line */
color: light-dark(#808000, #EEEED3);
/* relative colour syntax */
--hover: hsl(from #ffff00 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select

:root {
  --brand-50: #FEFEF1;
  --brand-100: #FCFCE3;
  --brand-200: #FCFCC0;
  --brand-300: #FFFF8F;
  --brand-400: #FFFF57;
  --brand-500: #FFFF1F;
  --brand-600: #ffff00;
  --brand-700: #CCCC00;
  --brand-800: #A3A300;
  --brand-900: #767605;
  --brand-950: #494903;
  --brand: #ffff00;
  --brand-ink: #000000;
  --brand-surface: #FAFAF4;
  --brand-border: #EDEDC0;
  --brand-hover: #DBDB00;
  --brand-pressed: #B8B800;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #242414;
    --brand-ink: #EEEED3;
  }
}

tailwind.config.jsclick to select

theme: {
  extend: {
    colors: {
      brand: {
        50: '#FEFEF1',
        100: '#FCFCE3',
        200: '#FCFCC0',
        300: '#FFFF8F',
        400: '#FFFF57',
        500: '#FFFF1F',
        600: '#ffff00',
        700: '#CCCC00',
        800: '#A3A300',
        900: '#767605',
        950: '#494903',
        DEFAULT: '#ffff00',
      },
    },
  },
}

scss mapclick to select

$brand: (
  '50': #FEFEF1,
  '100': #FCFCE3,
  '200': #FCFCC0,
  '300': #FFFF8F,
  '400': #FFFF57,
  '500': #FFFF1F,
  '600': #ffff00,
  '700': #CCCC00,
  '800': #A3A300,
  '900': #767605,
  '950': #494903,
);
$brand-base: #ffff00;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }

w3c design tokens (json)click to select

{
  "color": {
    "brand": {
      "50": { "$value": "#FEFEF1", "$type": "color" },
      "100": { "$value": "#FCFCE3", "$type": "color" },
      "200": { "$value": "#FCFCC0", "$type": "color" },
      "300": { "$value": "#FFFF8F", "$type": "color" },
      "400": { "$value": "#FFFF57", "$type": "color" },
      "500": { "$value": "#FFFF1F", "$type": "color" },
      "600": { "$value": "#ffff00", "$type": "color" },
      "700": { "$value": "#CCCC00", "$type": "color" },
      "800": { "$value": "#A3A300", "$type": "color" },
      "900": { "$value": "#767605", "$type": "color" },
      "950": { "$value": "#494903", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#000000 on #ffff00 · 19.56:1

Use #000000 — AAA at every size.

12px

16px

24px

White text · 1.07:1

AA fail · AA large fail · AAA fail

Black text · 19.56:1 · recommended

AA pass · AA large pass · AAA pass

Reading the other direction: #ffff00 as text scores 1.07:1 on white and 19.56:1 on black.

Best tinted ink on it, if plain black or white feels flat: #808000 at 3.91:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox

#7A7A00 · 4.55:1

AA on white−26% L

#7A7A00

The quick fox

#5C5C00 · 7.03:1

AAA on white−32% L

#5C5C00

The quick fox

#ffff00 · 19.56:1

AA on blackalready passes

#ffff00

The quick fox

#ffff00 · 19.56:1

AAA on blackalready passes

#ffff00

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #999900 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

#ffff00 on white: 1.07:1

AA ✗ fail · AA-large ✗ · AAA ✗

#ffff00 on black: 19.56:1

AA ✓ pass · AA-large ✓ · AAA ✓

Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #ffff00 as text on that neutral, and that neutral as text on #ffff00.

Neutral	Ratio	Verdict	Both directions
White#ffffff	1.07:1	AAAA lgAAA	AaAa
Slate 50#f8fafc	1.03:1	AAAA lgAAA	AaAa
Slate 100#f1f5f9	1.02:1	AAAA lgAAA	AaAa
Slate 200#e2e8f0	1.15:1	AAAA lgAAA	AaAa
Slate 300#cbd5e1	1.38:1	AAAA lgAAA	AaAa
Slate 400#94a3b8	2.39:1	AAAA lgAAA	AaAa
Slate 500#64748b	4.43:1	AAAA lgAAA	AaAa
Slate 600#475569	7.06:1	AAAA lgAAA	AaAa
Slate 700#334155	9.64:1	AAAA lgAAA	AaAa
Slate 800#1e293b	13.62:1	AAAA lgAAA	AaAa
Slate 900#0f172a	16.62:1	AAAA lgAAA	AaAa
Black#000000	19.56:1	AAAA lgAAA	AaAa

Colour vision deficiency

true color

protanopia · #FFF400

deuteranopia · #FFFA31

tritanopia · #FFEED9

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #ffff00 is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

50 100 200 300 400 500 600base 700 800 900 950

#FEFEF1

#FCFCE3

#FCFCC0

#FFFF8F

#FFFF57

#FFFF1F

#ffff00

#CCCC00

#A3A300

#767605

#494903

Base = 600Lightest = 50 · #FEFEF1Darkest = 950 · #494903Text step on white = 900

Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950

oklch tokensclick to select

:root {
  --brand-50: oklch(0.97 0.053 109.8);
  --brand-100: oklch(0.94 0.084 109.8);
  --brand-200: oklch(0.88 0.127 109.8);
  --brand-300: oklch(0.80 0.165 109.8);
  --brand-400: oklch(0.72 0.194 109.8);
  --brand-500: oklch(0.64 0.211 109.8);
  --brand-600: oklch(0.56 0.211 109.8);
  --brand-700: oklch(0.48 0.198 109.8);
  --brand-800: oklch(0.40 0.177 109.8);
  --brand-900: oklch(0.32 0.148 109.8);
  --brand-950: oklch(0.24 0.116 109.8);
}

Colors that work with #ffff00

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000

Black wins here

Surface#FAFAF4

Tinted page background

Border#EDEDC0

Hairlines and dividers

Muted text#9B9B4B

Captions on the surface

Accent#0040FF

Second voice, not a rival

Dark variant#808000

Hover, pressed, headers

Light variant#FFFFE5

Selected rows, tints

Dark surface#242414

Dark-mode background

Hover#DBDB00

One step down in lightness

Pressed#B8B800

Two steps down

Disabled#C7C7A8

Chroma pulled out

Focus ring#FFFF14

Offset from the fill so it reads

Light mode

Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge

Dark mode

Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states

Save changesHoverPressedDisabled

OutlineSubtleLinkFocused

Form field

Work email

you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates

Notice

Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft

Data

Storage used68%

Acme LtdActive

NorthwindTrial

GlobexActive

How to use #ffff00

Derived from its contrast, chroma and lightness — not from taste.

Works well for

✓Text and icons on dark surfaces
✓Primary buttons and calls to action
✓Focus rings, active and selected states
✓Brand accents, badges and data highlights
✓Chart series and data categories

Use with care

⚠Text of any size on white — fails WCAG AA
⚠Full-page backgrounds — tiring over long sessions
⚠Thin strokes and 1px borders — they disappear on light UI
⚠Pairing with a same-lightness hue — edges vibrate

Minimum size as text on white

Not as text

Safe as a fill behind white type

No — use #808000

Safe as a 1px border on white

No — use #999900

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

optimisticalertcheap-and-cheerfulvisible

The most visible hue at low light levels, which is why it owns warnings, hazard tape and value retail.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The mid lightness keeps it versatile in both themes.

Worth knowing

Almost never passes contrast against white. Treat it as a surface or a marker, not as text.

Reads as

FormalityLow
EnergyHigh
Weight50/100
TemperatureWarm
ApproachabilityHigh

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Lighter#FFFF47 Darker#B8B800 More saturated#FFFF00 Less saturated#E8E817 Warmer#FFB900 Cooler#A2FF00 Softer#DBDB43 Richer#E0E000 Hue −20°#FFAA00 Hue −10°#FFD500 Hue +10°#D4FF00 Hue +20°#AAFF00

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary	#0000FF	Directly opposite — maximum tension
Analogous left	#FF8000	Neighbour, quieter
Analogous right	#80FF00	Neighbour, quieter
Split-complement 1	#0080FF	Contrast without the clash
Split-complement 2	#8000FF	Contrast without the clash
Triadic 1	#00FFFF	Even thirds — balanced and loud
Triadic 2	#FF00FF	Even thirds — balanced and loud
Tetradic	#00FF80	Fourth corner of the square scheme

On the wheel

#ffff00 sits at 60°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red100.0%

Green100.0%

Blue0.0%

R · 0–255

255

0xff

G · 0–255

255

0xff

B · 0–255

0x00

CMYK percentages

Cyan0.0%

Magenta0.0%

Yellow100.0%

Key (black)0.0%

Total ink coverage is 100%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#ffff00 text on a black background

contrast 19.56:1

Card sample

#ffff00 text on a white background

contrast 1.07:1

Card sample

#ffff00 on grey

1.02:1

#ffff00 on its own surface

1.03:1

#ffff00 on its dark surface

14.62:1

CSS3 live lab

Text font color

The quick brown fox

color: #ffff00;

Background color

Panel with #ffff00 background

background-color: #ffff00;

Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #ffff00;

Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(255, 255, 0, 0.45);

Div box shadow

Elevated card

box-shadow: 0 12px 32px -8px rgba(255, 255, 0, 0.45);

Border & gradient

Gradient panel

border: 3px solid #ffff00;
background: linear-gradient(135deg, #ffff00, #55FF00);

Gradient text

Gradient headline

background: linear-gradient(90deg, #ffff00, #15FF00);
-webkit-background-clip: text;
color: transparent;

Focus ring

Focused control

outline: 2px solid #ffff00;
outline-offset: 3px;

Underline & caret

Marked up text

text-decoration-color: #ffff00;
caret-color: #ffff00;

Left rule

Pull quote or callout

border-left: 4px solid #ffff00;

Ring + tint

Selected chip

background: #FFFFE5;
box-shadow: inset 0 0 0 2px #ffff00;

Conic badge

68%

background: conic-gradient(#ffff00 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #ffff00 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

5%10%15%20%30%40%50%60%75%90%100%

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select

rgba(255, 255, 0, 0.5)
rgb(255 255 0 / 50%)
#ffff0080
hsl(60 100% 50% / 50%)
color-mix(in srgb, #ffff00 50%, transparent)

Alpha	8-digit hex	Flat on white
10%	#ffff001a	#FFFFE6
20%	#ffff0033	#FFFFCC
40%	#ffff0066	#FFFF99
60%	#ffff0099	#FFFF66
80%	#ffff00cc	#FFFF33

Gradients from #ffff00

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation

Same hue, three lightnesses — safe anywhere

background: linear-gradient(135deg, #FFFF3D, #ffff00 45%, #808000);

Duotone

A short hue run reads richer than a flat fill

background: linear-gradient(120deg, #ffff00, #38E000);

Complement sweep

Loud — keep it behind large type only

background: linear-gradient(90deg, #ffff00, #0000FF);

Spotlight

Hero panels and app headers

background: radial-gradient(120% 120% at 20% 0%, #FFFF5C 0%, #ffff00 45%, #808000 100%);

Soft wash

Section backgrounds that stay readable

background: linear-gradient(180deg, #FAFAF4, #ffffff);

Mesh

Ambient background, no image weight

background: radial-gradient(60% 60% at 15% 20%, #FF8833 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #7CFF1F 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #808000 0%, transparent 65%), #ffff00;

Monochromatic scale

#3D3D00 #858500 #CCCC00 #FFFF14 #FFFF5C #FFFFA3 #FFFFD6

Palettes built from #ffff00

UI palette

Gradient stops

Accent trio

Warm–cool bridge

Data series

Status set

Neutral companions

Shades — darker

#E6E600 #CCCC00 #B3B300 #999900 #808000 #666600 #4D4D00 #333300 #191900

Tints — lighter

#FFFF1A #FFFF33 #FFFF4D #FFFF66 #FFFF80 #FFFF99 #FFFFB3 #FFFFCC #FFFFE5

Tones — desaturated

#F2F20D #E6E619 #D9D926 #CCCC33 #BFBF40 #B3B34D #A6A659 #999966 #8C8C73

Color harmonies

Complement

Split-complement

Analogous

Triadic

Tetradic

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

Yellow#ffff00ΔE00 0 · ΔE76 0 Gold#ffd700ΔE00 11.6 · ΔE76 23.3 Khaki#f0e68cΔE00 12.8 · ΔE76 51.5 Green Yellow#adff2fΔE00 14.4 · ΔE76 33.8 Pale Goldenrod#eee8aaΔE00 17.1 · ΔE76 65.4 Yellow Green#9acd32ΔE00 18.1 · ΔE76 38.4

Closest CSS keywordYellow · ΔE 0 Closest darker nameDark Goldenrod · ΔE 32.4 Closest lighter nameKhaki · ΔE 12.8

Nearest Tailwind familylime-500 · #84cc16 · ΔE 20.2 Nearest web-safe colour#FFFF00 · ΔE 0

#ffff00 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries

RetailLeisureEnergyWarning systems

Common UI roles

ButtonsLinksFocus statesCharts

Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Very light values are indistinguishable from white on a dim phone screen outdoors. Give it a border if the boundary matters.

In dark mode

Usable as-is on a dark surface at 19.56:1.

Brand examples for off-white industrial yellow are listed above — each one links through to its own page.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

Off-White Industrial Yellow, answered

What is the Off-White yellow hex code?

Off-White’s industrial yellow is pure #ffff00, paired with black diagonals and the trademark quotation marks.

Why is Off-White yellow and black?

Virgil Abloh appropriated construction/hazard aesthetics — caution yellow, warning stripes — to interrogate luxury through irony. The ordinariness of the color IS the concept.

What was the Off-White x DHL collab?

A 2018 collection turning DHL’s literal courier branding (its #ffcc00) into fashion — industrial signifiers as high-fashion commentary.

What color is #ffff00?

#ffff00 is a balanced electric yellow — the CSS keyword Yellow. It sits at 60° on the hue wheel with 100% saturation and 50% lightness, which reads as warm.

What is the RGB value of #ffff00?

rgb(255, 255, 0) — 255 red, 255 green and 0 blue out of 255, or 100% / 100% / 0% by channel.

What is #ffff00 in HSL and HSV?

hsl(60, 100%, 50%) and hsv(60, 100%, 100%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #ffff00 a light or a dark color?

It is a light color. Relative luminance is 0.9278 and perceived brightness is 94%, so black text on it reaches 19.56:1.

Should I use black or white text on #ffff00?

Black. It scores 19.56:1 against #ffff00, versus 1.07:1 for white — AAA at any size.

Is #ffff00 accessible on a white background?

#ffff00 on white scores 1.07:1, which fails WCAG AA at every size. Darken it to #7A7A00 to reach 4.5:1, or #5C5C00 for 7:1.

What is the complementary color of #ffff00?

#0000FF sits directly opposite on the wheel. Softer options are the split-complements #0080FF and #8000FF, which give the same contrast with far less vibration.

What colors go well with #ffff00?

For interface work: #FAFAF4 as the surface, #EDEDC0 for borders, #9B9B4B for secondary text, #0040FF as an accent and #808000 for hover and pressed states. For a palette, the analogous pair #FF8000 and #80FF00 stays calm, while #0000FF is the loudest partner.

What is #ffff00 in CMYK for printing?

cmyk(0%, 0%, 100%, 0%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #ffff00 warm or cool?

Warm — it scores 25 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #FFB900; nudged cooler, #A2FF00.

Which Tailwind color is closest to #ffff00?

The lime family — its 500 step is #84cc16, ΔE2000 20.2 away. That is a visible difference, so define #ffff00 as a custom token rather than reaching for the built-in.

How do I use #ffff00 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#ffff00] or text-[#ffff00], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #ffff00 with 50% opacity?

rgba(255, 255, 0, 0.5), or #ffff0080 in eight-digit hex. Over white that composites to #FFFF80; over black, #808000.

Is #ffff00 a web-safe color?

No. The nearest web-safe colour is #FFFF00, ΔE2000 0 away. The palette only matters for legacy displays and some email clients now.

What does the color #ffff00 mean?

As a yellow, it reads optimistic, alert, cheap-and-cheerful. The most visible hue at low light levels, which is why it owns warnings, hazard tape and value retail. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #ffff00?

The safest is same-hue elevation: linear-gradient(135deg, #FFFF3D, #ffff00 45%, #808000). For more colour, a short hue run to #38E000 keeps it rich without turning muddy.

Work with #ffff00 in the Color Lab

Every tool opens with this colour already loaded.

Contrast Checker →Palette Generator →Palette Pro →Scale Generator →CSS Code Generator →Color Blind Simulator →Accessibility Checker →Color Distance →Gradient Generator →Image Color Picker →

Every value on this page is computed from #ffff00 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.