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yellow · warm

#def45f

a light, electric yellow · warm · closest name: Yellow

Token name suggestion: Meadow Citron

RGB
222, 244, 95
HSL
69°, 87%, 67%
CMYK
9, 0, 61, 4
Luminance
0.8106

#def45f is a light electric yellow, 69° on the wheel and 32/100 on the cool side. Put black text on it (17.21:1). As text it scores 1.22:1 on white — use #6D7E09 instead. Nearest name is Yellow, nearest Tailwind family is lime.

hsl(69 87% 67%)rgb(222 244 95)Base step 400AAA inkWarm

At a glance

Every number on this page in one read: what #def45f is made of, how bright it looks, and which way it leans.

Hex
#def45f
Hue
69°
yellow
Saturation
87%
electric
Lightness
67%
light
Brightness
96%
HSV value
Perceived
88%
weighted brightness
Luminance
0.8106
WCAG relative
Temperature
Warm
32/100 cool
Color family
Yellow
Tone
Electric
Best ink
Black
17.21:1
Closest name
Yellow
ΔE2000 8.6
Chroma
72.4
LCH, 0–130ish
OKLCH L
0.923
perceptual lightness
Tailwind
lime
500 · ΔE 13.8
Web-safe
#CCFF66
nearest of 216
Where it sits
Hue69° of 360°
Saturation87%
Lightness67%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #def45f.

Temperature
Warm ← → Cool32% cool

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

Luminance by channel
Red19%
Green80%
Blue1%

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

Every format

HEX#def45f
HEX (8-digit)#def45fff
RGBrgb(222, 244, 95)
RGBArgba(222, 244, 95, 1)
HSLhsl(69, 87%, 67%)
HSV / HSBhsv(69, 61%, 96%)
HWBhwb(69 37% 4%)
CMYKcmyk(9%, 0%, 61%, 4%)
LABlab(92.2 -26.7 67.3)
LCHlch(92.2 72.4 111.7)
OKLCHoklch(0.923 0.173 117.0)
XYZ (D65)xyz(64.54, 81.06, 23.07)
Decimal14611551
Display P3color(display-p3 0.871 0.957 0.373)
Web-safe#CCFF66

Copy-ready code

every platformclick to select
/* CSS */
color: #def45f;
background-color: #def45f;
/* CSS custom property */
--brand: #def45f;
/* Tailwind (arbitrary) */
class="text-[#def45f] bg-[#def45f]"
/* SCSS */
$brand: #def45f;
/* SwiftUI */
Color(red: 0.871, green: 0.957, blue: 0.373)
/* UIKit */
UIColor(red: 0.871, green: 0.957, blue: 0.373, alpha: 1)
/* Android XML */
<color name="brand">#DEF45F</color>
/* Android Compose */
Color(0xFFDEF45F)
/* Flutter */
Color(0xFFDEF45F)
/* Python / OpenCV (BGR) */
(95, 244, 222)
/* Python / PIL (RGB) */
(222, 244, 95)
/* Java AWT */
new Color(222, 244, 95)
/* .NET */
Color.FromArgb(255, 222, 244, 95)
/* OpenGL / Unity (0–1) */
(0.8706f, 0.9569f, 0.3725f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{222,244,95}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #def45f 85%, white);
border-color: color-mix(in oklab, #def45f 40%, transparent);
/* theme-aware in one line */
color: light-dark(#677708, #EAEED3);
/* relative colour syntax */
--hover: hsl(from #def45f 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: #FBFDF2;
  --brand-100: #F7FAE5;
  --brand-200: #F0F7C4;
  --brand-300: #E9F896;
  --brand-400: #def45f;
  --brand-500: #D4F12D;
  --brand-600: #C5E510;
  --brand-700: #A4BF0D;
  --brand-800: #84990B;
  --brand-900: #606E0C;
  --brand-950: #3C4508;
  --brand: #def45f;
  --brand-ink: #000000;
  --brand-surface: #FAFAF4;
  --brand-border: #E6EDC0;
  --brand-hover: #D7F23E;
  --brand-pressed: #D0EF1C;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #222414;
    --brand-ink: #EAEED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FBFDF2',
        100: '#F7FAE5',
        200: '#F0F7C4',
        300: '#E9F896',
        400: '#def45f',
        500: '#D4F12D',
        600: '#C5E510',
        700: '#A4BF0D',
        800: '#84990B',
        900: '#606E0C',
        950: '#3C4508',
        DEFAULT: '#def45f',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FBFDF2,
  '100': #F7FAE5,
  '200': #F0F7C4,
  '300': #E9F896,
  '400': #def45f,
  '500': #D4F12D,
  '600': #C5E510,
  '700': #A4BF0D,
  '800': #84990B,
  '900': #606E0C,
  '950': #3C4508,
);
$brand-base: #def45f;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FBFDF2", "$type": "color" },
      "100": { "$value": "#F7FAE5", "$type": "color" },
      "200": { "$value": "#F0F7C4", "$type": "color" },
      "300": { "$value": "#E9F896", "$type": "color" },
      "400": { "$value": "#def45f", "$type": "color" },
      "500": { "$value": "#D4F12D", "$type": "color" },
      "600": { "$value": "#C5E510", "$type": "color" },
      "700": { "$value": "#A4BF0D", "$type": "color" },
      "800": { "$value": "#84990B", "$type": "color" },
      "900": { "$value": "#606E0C", "$type": "color" },
      "950": { "$value": "#3C4508", "$type": "color" }
    },
    "brandInk": { "$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 #def45f · 17.21:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.22:1
AA fail · AA large fail · AAA fail
Aa
Black text · 17.21:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #def45f as text scores 1.22:1 on white and 17.21:1 on black.
Best tinted ink on it, if plain black or white feels flat: #677708 at 4.08:1.

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
#6D7E09 · 4.53:1
AA on white−40% L
#6D7E09
The quick fox
#505D06 · 7.22:1
AAA on white−47% L
#505D06
The quick fox
#def45f · 17.21:1
AA on blackalready passes
#def45f
The quick fox
#def45f · 17.21:1
AAA on blackalready passes
#def45f

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #869B0B 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

Aa
#def45f on white: 1.22:1
AA ✗ fail · AA-large · AAA
Aa
#def45f on black: 17.21:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #def45f as text on that neutral, and that neutral as text on #def45f.

NeutralRatioBoth directions
White1.22:1AaAa
Slate 501.17:1AaAa
Slate 1001.11:1AaAa
Slate 2001.01:1AaAa
Slate 3001.22:1AaAa
Slate 4002.10:1AaAa
Slate 5003.90:1AaAa
Slate 6006.21:1AaAa
Slate 7008.49:1AaAa
Slate 80011.99:1AaAa
Slate 90014.63:1AaAa
Black17.21:1AaAa
Colour vision deficiency
true color
protanopia · #FFE84D
deuteranopia · #FFE969
tritanopia · #EBE7D5

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. #def45f is pinned to step 400; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FBFDF2
#F7FAE5
#F0F7C4
#E9F896
#def45f
#D4F12D
#C5E510
#A4BF0D
#84990B
#606E0C
#3C4508
Base = 400Lightest = 50 · #FBFDF2Darkest = 950 · #3C4508Text 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 0.043 117.0);
  --brand-100: oklch(0.94 0.069 117.0);
  --brand-200: oklch(0.88 0.104 117.0);
  --brand-300: oklch(0.80 0.135 117.0);
  --brand-400: oklch(0.72 0.159 117.0);
  --brand-500: oklch(0.64 0.173 117.0);
  --brand-600: oklch(0.56 0.173 117.0);
  --brand-700: oklch(0.48 0.162 117.0);
  --brand-800: oklch(0.40 0.145 117.0);
  --brand-900: oklch(0.32 0.121 117.0);
  --brand-950: oklch(0.24 0.095 117.0);
}

Colors that work with #def45f

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#E6EDC0
Hairlines and dividers
Muted text#8F9B4B
Captions on the surface
Accent#5C6CF7
Second voice, not a rival
Dark variant#677708
Hover, pressed, headers
Light variant#FAFDE7
Selected rows, tints
Dark surface#222414
Dark-mode background
Hover#D7F23E
One step down in lightness
Pressed#D0EF1C
Two steps down
Disabled#E6E8DB
Chroma pulled out
Focus ring#E7FD6B
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
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 #def45f

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
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • White text placed on it
  • 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 #677708
Safe as a 1px border on white
No — use #869B0B

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 lightness keeps it airy and approachable.

Worth knowing

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

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight34/100
  • 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.

Color relationships

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

Complementary#755FF4
Analogous left#F4C05F
Analogous right#94F45F
Split-complement 1#5F94F4
Split-complement 2#C05FF4
Triadic 1#5FDEF4
Triadic 2#F45FDE
Tetradic#5FF4C0
On the wheel
Base+30°−30°+120°+240°+180°69°

#def45f sits at 69°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red87.1%
Green95.7%
Blue37.3%
R · 0–255
222
0xde
G · 0–255
244
0xf4
B · 0–255
95
0x5f

CMYK percentages

Cyan9.0%
Magenta0.0%
Yellow61.1%
Key (black)4.3%

Total ink coverage is 74%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#def45f text on a black background

contrast 17.21:1

Card sample

#def45f text on a white background

contrast 1.22:1

Card sample

#def45f on grey

1.11:1

#def45f on its own surface

1.16:1

#def45f on its dark surface

12.94:1

CSS3 live lab

Text font color

The quick brown fox

color: #def45f;
Background color
Panel with #def45f background
background-color: #def45f;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #def45f;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(222, 244, 95, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(222, 244, 95, 0.45);
Border & gradient
Gradient panel
border: 3px solid #def45f;
background: linear-gradient(135deg, #def45f, #7BF45F);
Gradient text

Gradient headline

background: linear-gradient(90deg, #def45f, #5FF469);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #def45f;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #def45f;
caret-color: #def45f;
Left rule
Pull quote or callout
border-left: 4px solid #def45f;
Ring + tint
Selected chip
background: #FAFDE7;
box-shadow: inset 0 0 0 2px #def45f;
Conic badge
68%
background: conic-gradient(#def45f 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #def45f over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

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(222, 244, 95, 0.5)
rgb(222 244 95 / 50%)
#def45f80
hsl(69 87% 67% / 50%)
color-mix(in srgb, #def45f 50%, transparent)
Alpha8-digit hexFlat on white
10%#def45f1a#FCFEEF
20%#def45f33#F8FDDF
40%#def45f66#F2FBBF
60%#def45f99#EBF89F
80%#def45fcc#E5F67F

Gradients from #def45f

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, #EAF898, #def45f 45%, #677708);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #def45f, #54F243);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #def45f, #755FF4);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F0FAB5 0%, #def45f 45%, #677708 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%, #F7CA8F 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #9DF67C 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #677708 0%, transparent 65%), #def45f;

Monochromatic scale

Palettes built from #def45f

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

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.

#def45f 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
SurfacesBadgesHighlightsEmpty states
Print note

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

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Usable as-is on a dark surface at 17.21:1.

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.

#def45f, answered

What color is #def45f?

#def45f is a light electric yellow, closest to Yellow (ΔE2000 8.6). It sits at 69° on the hue wheel with 87% saturation and 67% lightness, which reads as warm.

What is the RGB value of #def45f?

rgb(222, 244, 95) — 222 red, 244 green and 95 blue out of 255, or 87.1% / 95.7% / 37.3% by channel.

What is #def45f in HSL and HSV?

hsl(69, 87%, 67%) and hsv(69, 61%, 96%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #def45f a light or a dark color?

It is a light color. Relative luminance is 0.8106 and perceived brightness is 88%, so black text on it reaches 17.21:1.

Should I use black or white text on #def45f?

Black. It scores 17.21:1 against #def45f, versus 1.22:1 for white — AAA at any size.

Is #def45f accessible on a white background?

#def45f on white scores 1.22:1, which fails WCAG AA at every size. Darken it to #6D7E09 to reach 4.5:1, or #505D06 for 7:1.

What is the complementary color of #def45f?

#755FF4 sits directly opposite on the wheel. Softer options are the split-complements #5F94F4 and #C05FF4, which give the same contrast with far less vibration.

What colors go well with #def45f?

For interface work: #FAFAF4 as the surface, #E6EDC0 for borders, #8F9B4B for secondary text, #5C6CF7 as an accent and #677708 for hover and pressed states. For a palette, the analogous pair #F4C05F and #94F45F stays calm, while #755FF4 is the loudest partner.

What is #def45f in CMYK for printing?

cmyk(9%, 0%, 61%, 4%). 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 #def45f warm or cool?

Warm — it scores 32 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #F4D35F; nudged cooler, #A7F65D.

Which Tailwind color is closest to #def45f?

The lime family — its 500 step is #84cc16, ΔE2000 13.8 away. That is a visible difference, so define #def45f as a custom token rather than reaching for the built-in.

How do I use #def45f in Tailwind CSS?

Inline it as an arbitrary value with bg-[#def45f] or text-[#def45f], 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 #def45f with 50% opacity?

rgba(222, 244, 95, 0.5), or #def45f80 in eight-digit hex. Over white that composites to #EFFAAF; over black, #6F7A30.

Is #def45f a web-safe color?

No. The nearest web-safe colour is #CCFF66, ΔE2000 5.3 away. The palette only matters for legacy displays and some email clients now.

What does the color #def45f 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 #def45f?

The safest is same-hue elevation: linear-gradient(135deg, #EAF898, #def45f 45%, #677708). For more colour, a short hue run to #54F243 keeps it rich without turning muddy.

Work with #def45f in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #def45f at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.