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yellow · warm

#e5c821

a balanced, electric yellow · warm · closest name: Gold

Token name suggestion: Studio Citron

RGB
229, 200, 33
HSL
51°, 79%, 51%
CMYK
0, 13, 86, 10
Luminance
0.5808

#e5c821 is a balanced electric yellow, 51° on the wheel and 18/100 on the cool side. Put black text on it (12.62:1). As text it scores 1.66:1 on white — use #867510 instead. Nearest name is Gold, nearest Tailwind family is yellow.

hsl(51 79% 51%)rgb(229 200 33)Base step 600AAA inkWarm

At a glance

Every number on this page in one read: what #e5c821 is made of, how bright it looks, and which way it leans.

Hex
#e5c821
Hue
51°
yellow
Saturation
79%
electric
Lightness
51%
balanced
Brightness
90%
HSV value
Perceived
78%
weighted brightness
Luminance
0.5808
WCAG relative
Temperature
Warm
18/100 cool
Color family
Yellow
Tone
Electric
Best ink
Black
12.62:1
Closest name
Gold
ΔE2000 5
Chroma
77.3
LCH, 0–130ish
OKLCH L
0.833
perceptual lightness
Tailwind
yellow
500 · ΔE 8.2
Web-safe
#CCCC33
nearest of 216
Where it sits
Hue51° of 360°
Saturation79%
Lightness51%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #e5c821.

Temperature
Warm ← → Cool18% 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
Red29%
Green71%
Blue0%

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

Every format

HEX#e5c821
HEX (8-digit)#e5c821ff
RGBrgb(229, 200, 33)
RGBArgba(229, 200, 33, 1)
HSLhsl(51, 79%, 51%)
HSV / HSBhsv(51, 86%, 90%)
HWBhwb(51 13% 10%)
CMYKcmyk(0%, 13%, 86%, 10%)
LABlab(80.8 -5.0 77.1)
LCHlch(80.8 77.3 93.7)
OKLCHoklch(0.833 0.166 98.1)
XYZ (D65)xyz(53.24, 58.08, 9.84)
Decimal15058977
Display P3color(display-p3 0.898 0.784 0.129)
Web-safe#CCCC33

Copy-ready code

every platformclick to select
/* CSS */
color: #e5c821;
background-color: #e5c821;
/* CSS custom property */
--brand: #e5c821;
/* Tailwind (arbitrary) */
class="text-[#e5c821] bg-[#e5c821]"
/* SCSS */
$brand: #e5c821;
/* SwiftUI */
Color(red: 0.898, green: 0.784, blue: 0.129)
/* UIKit */
UIColor(red: 0.898, green: 0.784, blue: 0.129, alpha: 1)
/* Android XML */
<color name="brand">#E5C821</color>
/* Android Compose */
Color(0xFFE5C821)
/* Flutter */
Color(0xFFE5C821)
/* Python / OpenCV (BGR) */
(33, 200, 229)
/* Python / PIL (RGB) */
(229, 200, 33)
/* Java AWT */
new Color(229, 200, 33)
/* .NET */
Color.FromArgb(255, 229, 200, 33)
/* OpenGL / Unity (0–1) */
(0.8980f, 0.7843f, 0.1294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{229,200,33}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #e5c821 85%, white);
border-color: color-mix(in oklab, #e5c821 40%, transparent);
/* theme-aware in one line */
color: light-dark(#72630D, #EEEAD3);
/* relative colour syntax */
--hover: hsl(from #e5c821 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: #FCFBF3;
  --brand-100: #F9F6E6;
  --brand-200: #F5EEC7;
  --brand-300: #F3E69B;
  --brand-400: #EDDA68;
  --brand-500: #E7CD36;
  --brand-600: #e5c821;
  --brand-700: #B79F15;
  --brand-800: #927F11;
  --brand-900: #6A5C11;
  --brand-950: #423A0A;
  --brand: #e5c821;
  --brand-ink: #000000;
  --brand-surface: #FAFAF4;
  --brand-border: #EDE6C0;
  --brand-hover: #CBB018;
  --brand-pressed: #AB9414;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #242214;
    --brand-ink: #EEEAD3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FCFBF3',
        100: '#F9F6E6',
        200: '#F5EEC7',
        300: '#F3E69B',
        400: '#EDDA68',
        500: '#E7CD36',
        600: '#e5c821',
        700: '#B79F15',
        800: '#927F11',
        900: '#6A5C11',
        950: '#423A0A',
        DEFAULT: '#e5c821',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FCFBF3,
  '100': #F9F6E6,
  '200': #F5EEC7,
  '300': #F3E69B,
  '400': #EDDA68,
  '500': #E7CD36,
  '600': #e5c821,
  '700': #B79F15,
  '800': #927F11,
  '900': #6A5C11,
  '950': #423A0A,
);
$brand-base: #e5c821;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FCFBF3", "$type": "color" },
      "100": { "$value": "#F9F6E6", "$type": "color" },
      "200": { "$value": "#F5EEC7", "$type": "color" },
      "300": { "$value": "#F3E69B", "$type": "color" },
      "400": { "$value": "#EDDA68", "$type": "color" },
      "500": { "$value": "#E7CD36", "$type": "color" },
      "600": { "$value": "#e5c821", "$type": "color" },
      "700": { "$value": "#B79F15", "$type": "color" },
      "800": { "$value": "#927F11", "$type": "color" },
      "900": { "$value": "#6A5C11", "$type": "color" },
      "950": { "$value": "#423A0A", "$type": "color" }
    },
    "brandInk": { "$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 #e5c821 · 12.62:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.66:1
AA fail · AA large fail · AAA fail
Aa
Black text · 12.62:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #e5c821 as text scores 1.66:1 on white and 12.62:1 on black.
Best tinted ink on it, if plain black or white feels flat: #72630D at 3.60:1.

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
#867510 · 4.60:1
AA on white−22% L
#867510
The quick fox
#66590C · 7.00:1
AAA on white−29% L
#66590C
The quick fox
#e5c821 · 12.62:1
AA on blackalready passes
#e5c821
The quick fox
#e5c821 · 12.62:1
AAA on blackalready passes
#e5c821

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #AB9414 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
#e5c821 on white: 1.66:1
AA ✗ fail · AA-large · AAA
Aa
#e5c821 on black: 12.62:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #e5c821 as text on that neutral, and that neutral as text on #e5c821.

NeutralRatioBoth directions
White1.66:1AaAa
Slate 501.59:1AaAa
Slate 1001.52:1AaAa
Slate 2001.35:1AaAa
Slate 3001.12:1AaAa
Slate 4001.54:1AaAa
Slate 5002.86:1AaAa
Slate 6004.55:1AaAa
Slate 7006.22:1AaAa
Slate 8008.79:1AaAa
Slate 90010.72:1AaAa
Black12.62:1AaAa
Colour vision deficiency
true color
protanopia · #DDC300
deuteranopia · #E5CD31
tritanopia · #F8B8AB

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. #e5c821 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.

#FCFBF3
#F9F6E6
#F5EEC7
#F3E69B
#EDDA68
#E7CD36
#e5c821
#B79F15
#927F11
#6A5C11
#423A0A
Base = 600Lightest = 50 · #FCFBF3Darkest = 950 · #423A0AText 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 0.041 98.1);
  --brand-100: oklch(0.94 0.066 98.1);
  --brand-200: oklch(0.88 0.099 98.1);
  --brand-300: oklch(0.80 0.129 98.1);
  --brand-400: oklch(0.72 0.153 98.1);
  --brand-500: oklch(0.64 0.166 98.1);
  --brand-600: oklch(0.56 0.166 98.1);
  --brand-700: oklch(0.48 0.156 98.1);
  --brand-800: oklch(0.40 0.139 98.1);
  --brand-900: oklch(0.32 0.116 98.1);
  --brand-950: oklch(0.24 0.091 98.1);
}

Colors that work with #e5c821

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#EDE6C0
Hairlines and dividers
Muted text#9B8F4B
Captions on the surface
Accent#1C6EEA
Second voice, not a rival
Dark variant#72630D
Hover, pressed, headers
Light variant#FCF9E8
Selected rows, tints
Dark surface#242214
Dark-mode background
Hover#CBB018
One step down in lightness
Pressed#AB9414
Two steps down
Disabled#CAC6AC
Chroma pulled out
Focus ring#F2D428
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 #e5c821

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 #72630D
Safe as a 1px border on white
No — use #AB9414

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
  • Weight49/100
  • 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#213EE5
Analogous left#E56621
Analogous right#A0E521
Split-complement 1#21A0E5
Split-complement 2#6621E5
Triadic 1#21E5C8
Triadic 2#C821E5
Tetradic#21E566
On the wheel
Base+30°−30°+120°+240°+180°51°

#e5c821 sits at 51°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red89.8%
Green78.4%
Blue12.9%
R · 0–255
229
0xe5
G · 0–255
200
0xc8
B · 0–255
33
0x21

CMYK percentages

Cyan0.0%
Magenta12.7%
Yellow85.6%
Key (black)10.2%

Total ink coverage is 109%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#e5c821 text on a black background

contrast 12.62:1

Card sample

#e5c821 text on a white background

contrast 1.66:1

Card sample

#e5c821 on grey

1.52:1

#e5c821 on its own surface

1.59:1

#e5c821 on its dark surface

9.60:1

CSS3 live lab

Text font color

The quick brown fox

color: #e5c821;
Background color
Panel with #e5c821 background
background-color: #e5c821;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #e5c821;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(229, 200, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(229, 200, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #e5c821;
background: linear-gradient(135deg, #e5c821, #7FE521);
Gradient text

Gradient headline

background: linear-gradient(90deg, #e5c821, #4FE521);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #e5c821;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #e5c821;
caret-color: #e5c821;
Left rule
Pull quote or callout
border-left: 4px solid #e5c821;
Ring + tint
Selected chip
background: #FCF9E8;
box-shadow: inset 0 0 0 2px #e5c821;
Conic badge
68%
background: conic-gradient(#e5c821 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #e5c821 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(229, 200, 33, 0.5)
rgb(229 200 33 / 50%)
#e5c82180
hsl(51 79% 51% / 50%)
color-mix(in srgb, #e5c821 50%, transparent)
Alpha8-digit hexFlat on white
10%#e5c8211a#FCFAE9
20%#e5c82133#FAF4D3
40%#e5c82166#F5E9A6
60%#e5c82199#EFDE7A
80%#e5c821cc#EAD34D

Gradients from #e5c821

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, #EBD658, #e5c821 45%, #72630D);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #e5c821, #61CF18);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #e5c821, #213EE5);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #EFDC73 0%, #e5c821 45%, #72630D 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%, #EA794F 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #9EE83D 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #72630D 0%, transparent 65%), #e5c821;

Monochromatic scale

Palettes built from #e5c821

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.

#e5c821 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

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 12.62:1.

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.

#e5c821, answered

What color is #e5c821?

#e5c821 is a balanced electric yellow, closest to Gold (ΔE2000 5). It sits at 51° on the hue wheel with 79% saturation and 51% lightness, which reads as warm.

What is the RGB value of #e5c821?

rgb(229, 200, 33) — 229 red, 200 green and 33 blue out of 255, or 89.8% / 78.4% / 12.9% by channel.

What is #e5c821 in HSL and HSV?

hsl(51, 79%, 51%) and hsv(51, 86%, 90%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #e5c821 a light or a dark color?

It is a light color. Relative luminance is 0.5808 and perceived brightness is 78%, so black text on it reaches 12.62:1.

Should I use black or white text on #e5c821?

Black. It scores 12.62:1 against #e5c821, versus 1.66:1 for white — AAA at any size.

Is #e5c821 accessible on a white background?

#e5c821 on white scores 1.66:1, which fails WCAG AA at every size. Darken it to #867510 to reach 4.5:1, or #66590C for 7:1.

What is the complementary color of #e5c821?

#213EE5 sits directly opposite on the wheel. Softer options are the split-complements #21A0E5 and #6621E5, which give the same contrast with far less vibration.

What colors go well with #e5c821?

For interface work: #FAFAF4 as the surface, #EDE6C0 for borders, #9B8F4B for secondary text, #1C6EEA as an accent and #72630D for hover and pressed states. For a palette, the analogous pair #E56621 and #A0E521 stays calm, while #213EE5 is the loudest partner.

What is #e5c821 in CMYK for printing?

cmyk(0%, 13%, 86%, 10%). 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 #e5c821 warm or cool?

Warm — it scores 18 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #E59B21; nudged cooler, #BCE71F.

Which Tailwind color is closest to #e5c821?

The yellow family — its 500 step is #eab308, ΔE2000 8.2 away. That is a visible difference, so define #e5c821 as a custom token rather than reaching for the built-in.

How do I use #e5c821 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#e5c821] or text-[#e5c821], 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 #e5c821 with 50% opacity?

rgba(229, 200, 33, 0.5), or #e5c82180 in eight-digit hex. Over white that composites to #F2E490; over black, #736411.

Is #e5c821 a web-safe color?

No. The nearest web-safe colour is #CCCC33, ΔE2000 7.4 away. The palette only matters for legacy displays and some email clients now.

What does the color #e5c821 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 #e5c821?

The safest is same-hue elevation: linear-gradient(135deg, #EBD658, #e5c821 45%, #72630D). For more colour, a short hue run to #61CF18 keeps it rich without turning muddy.

Work with #e5c821 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #e5c821 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.