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green · warm

#afd621

a balanced, vivid green · warm · closest name: Yellow Green

Token name suggestion: Studio Jade

RGB
175, 214, 33
HSL
73°, 73%, 48%
CMYK
18, 0, 85, 16
Luminance
0.5732

#afd621 is a balanced vivid green, 73° on the wheel and 36/100 on the cool side. Put black text on it (12.46:1). As text it scores 1.68:1 on white — use #677E13 instead. Nearest name is Yellow Green, nearest Tailwind family is lime.

hsl(73 73% 48%)rgb(175 214 33)Base step 600AAA inkWarm

At a glance

Every number on this page in one read: what #afd621 is made of, how bright it looks, and which way it leans.

Hex
#afd621
Hue
73°
green
Saturation
73%
vivid
Lightness
48%
balanced
Brightness
84%
HSV value
Perceived
75%
weighted brightness
Luminance
0.5732
WCAG relative
Temperature
Warm
36/100 cool
Color family
Green
Tone
Vivid
Best ink
Black
12.46:1
Closest name
Yellow Green
ΔE2000 4.3
Chroma
82.6
LCH, 0–130ish
OKLCH L
0.819
perceptual lightness
Tailwind
lime
500 · ΔE 6.6
Web-safe
#99CC33
nearest of 216
Where it sits
Hue73° of 360°
Saturation73%
Lightness48%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #afd621.

Temperature
Warm ← → Cool36% 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
Red16%
Green84%
Blue0%

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

Every format

HEX#afd621
HEX (8-digit)#afd621ff
RGBrgb(175, 214, 33)
RGBArgba(175, 214, 33, 1)
HSLhsl(73, 73%, 48%)
HSV / HSBhsv(73, 85%, 84%)
HWBhwb(73 13% 16%)
CMYKcmyk(18%, 0%, 85%, 16%)
LABlab(80.4 -34.5 75.0)
LCHlch(80.4 82.6 114.7)
OKLCHoklch(0.819 0.192 122.3)
XYZ (D65)xyz(42.00, 57.32, 10.29)
Decimal11523617
Display P3color(display-p3 0.686 0.839 0.129)
Web-safe#99CC33

Copy-ready code

every platformclick to select
/* CSS */
color: #afd621;
background-color: #afd621;
/* CSS custom property */
--brand: #afd621;
/* Tailwind (arbitrary) */
class="text-[#afd621] bg-[#afd621]"
/* SCSS */
$brand: #afd621;
/* SwiftUI */
Color(red: 0.686, green: 0.839, blue: 0.129)
/* UIKit */
UIColor(red: 0.686, green: 0.839, blue: 0.129, alpha: 1)
/* Android XML */
<color name="brand">#AFD621</color>
/* Android Compose */
Color(0xFFAFD621)
/* Flutter */
Color(0xFFAFD621)
/* Python / OpenCV (BGR) */
(33, 214, 175)
/* Python / PIL (RGB) */
(175, 214, 33)
/* Java AWT */
new Color(175, 214, 33)
/* .NET */
Color.FromArgb(255, 175, 214, 33)
/* OpenGL / Unity (0–1) */
(0.6863f, 0.8392f, 0.1294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{175,214,33}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #afd621 85%, white);
border-color: color-mix(in oklab, #afd621 40%, transparent);
/* theme-aware in one line */
color: light-dark(#5A6E11, #E8EED3);
/* relative colour syntax */
--hover: hsl(from #afd621 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: #FAFCF3;
  --brand-100: #F5F8E7;
  --brand-200: #EAF3C8;
  --brand-300: #DEF09E;
  --brand-400: #CEE96D;
  --brand-500: #BEE13D;
  --brand-600: #afd621;
  --brand-700: #91B11B;
  --brand-800: #748D16;
  --brand-900: #556614;
  --brand-950: #35400C;
  --brand: #afd621;
  --brand-ink: #000000;
  --brand-surface: #F9FAF4;
  --brand-border: #E3EDC0;
  --brand-hover: #96B71C;
  --brand-pressed: #7C9817;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #212414;
    --brand-ink: #E8EED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FAFCF3',
        100: '#F5F8E7',
        200: '#EAF3C8',
        300: '#DEF09E',
        400: '#CEE96D',
        500: '#BEE13D',
        600: '#afd621',
        700: '#91B11B',
        800: '#748D16',
        900: '#556614',
        950: '#35400C',
        DEFAULT: '#afd621',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FAFCF3,
  '100': #F5F8E7,
  '200': #EAF3C8,
  '300': #DEF09E,
  '400': #CEE96D,
  '500': #BEE13D,
  '600': #afd621,
  '700': #91B11B,
  '800': #748D16,
  '900': #556614,
  '950': #35400C,
);
$brand-base: #afd621;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FAFCF3", "$type": "color" },
      "100": { "$value": "#F5F8E7", "$type": "color" },
      "200": { "$value": "#EAF3C8", "$type": "color" },
      "300": { "$value": "#DEF09E", "$type": "color" },
      "400": { "$value": "#CEE96D", "$type": "color" },
      "500": { "$value": "#BEE13D", "$type": "color" },
      "600": { "$value": "#afd621", "$type": "color" },
      "700": { "$value": "#91B11B", "$type": "color" },
      "800": { "$value": "#748D16", "$type": "color" },
      "900": { "$value": "#556614", "$type": "color" },
      "950": { "$value": "#35400C", "$type": "color" }
    },
    "brandInk": { "$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 #afd621 · 12.46:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.68:1
AA fail · AA large fail · AAA fail
Aa
Black text · 12.46:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #afd621 as text scores 1.68:1 on white and 12.46:1 on black.
Best tinted ink on it, if plain black or white feels flat: #5A6E11 at 3.39:1.

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
#677E13 · 4.59:1
AA on white−20% L
#677E13
The quick fox
#4D5F0F · 7.10:1
AAA on white−27% L
#4D5F0F
The quick fox
#afd621 · 12.46:1
AA on blackalready passes
#afd621
The quick fox
#afd621 · 12.46:1
AAA on blackalready passes
#afd621

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #809C18 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
#afd621 on white: 1.68:1
AA ✗ fail · AA-large · AAA
Aa
#afd621 on black: 12.46:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #afd621 as text on that neutral, and that neutral as text on #afd621.

NeutralRatioBoth directions
White1.68:1AaAa
Slate 501.61:1AaAa
Slate 1001.54:1AaAa
Slate 2001.37:1AaAa
Slate 3001.13:1AaAa
Slate 4001.52:1AaAa
Slate 5002.82:1AaAa
Slate 6004.50:1AaAa
Slate 7006.15:1AaAa
Slate 8008.68:1AaAa
Slate 90010.60:1AaAa
Black12.46:1AaAa
Colour vision deficiency
true color
protanopia · #E3C800
deuteranopia · #DEC737
tritanopia · #B9CBB7

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. #afd621 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.

#FAFCF3
#F5F8E7
#EAF3C8
#DEF09E
#CEE96D
#BEE13D
#afd621
#91B11B
#748D16
#556614
#35400C
Base = 600Lightest = 50 · #FAFCF3Darkest = 950 · #35400CText 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 0.048 122.3);
  --brand-100: oklch(0.94 0.077 122.3);
  --brand-200: oklch(0.88 0.115 122.3);
  --brand-300: oklch(0.80 0.150 122.3);
  --brand-400: oklch(0.72 0.176 122.3);
  --brand-500: oklch(0.64 0.192 122.3);
  --brand-600: oklch(0.56 0.192 122.3);
  --brand-700: oklch(0.48 0.180 122.3);
  --brand-800: oklch(0.40 0.161 122.3);
  --brand-900: oklch(0.32 0.134 122.3);
  --brand-950: oklch(0.24 0.105 122.3);
}

Colors that work with #afd621

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#F9FAF4
Tinted page background
Border#E3EDC0
Hairlines and dividers
Muted text#8A9B4B
Captions on the surface
Accent#1C23DB
Second voice, not a rival
Dark variant#5A6E11
Hover, pressed, headers
Light variant#F8FCE9
Selected rows, tints
Dark surface#212414
Dark-mode background
Hover#96B71C
One step down in lightness
Pressed#7C9817
Two steps down
Disabled#BDC4A3
Chroma pulled out
Focus ring#BFEB21
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 #afd621

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
  • Status meaning — pair it with an icon or label, never colour alone
  • 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 #5A6E11
Safe as a 1px border on white
No — use #809C18

Meaning and mood

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

safegrowingnaturalpermissive

Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. The mid lightness keeps it versatile in both themes.

Worth knowing

Red/green pairs are the most common colour-blindness failure — never let the two carry meaning alone.

Reads as
  • FormalityMedium
  • EnergyMedium-high
  • Weight52/100
  • 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#4821D6
Analogous left#D6A221
Analogous right#55D621
Split-complement 1#2155D6
Split-complement 2#A221D6
Triadic 1#21AFD6
Triadic 2#D621AF
Tetradic#21D6A2
On the wheel
Base+30°−30°+120°+240°+180°73°

#afd621 sits at 73°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red68.6%
Green83.9%
Blue12.9%
R · 0–255
175
0xaf
G · 0–255
214
0xd6
B · 0–255
33
0x21

CMYK percentages

Cyan18.2%
Magenta0.0%
Yellow84.6%
Key (black)16.1%

Total ink coverage is 119%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#afd621 text on a black background

contrast 12.46:1

Card sample

#afd621 text on a white background

contrast 1.68:1

Card sample

#afd621 on grey

1.54:1

#afd621 on its own surface

1.61:1

#afd621 on its dark surface

9.39:1

CSS3 live lab

Text font color

The quick brown fox

color: #afd621;
Background color
Panel with #afd621 background
background-color: #afd621;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #afd621;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(175, 214, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(175, 214, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #afd621;
background: linear-gradient(135deg, #afd621, #36D621);
Gradient text

Gradient headline

background: linear-gradient(90deg, #afd621, #21D639);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #afd621;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #afd621;
caret-color: #afd621;
Left rule
Pull quote or callout
border-left: 4px solid #afd621;
Ring + tint
Selected chip
background: #F8FCE9;
box-shadow: inset 0 0 0 2px #afd621;
Conic badge
68%
background: conic-gradient(#afd621 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #afd621 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(175, 214, 33, 0.5)
rgb(175 214 33 / 50%)
#afd62180
hsl(73 73% 48% / 50%)
color-mix(in srgb, #afd621 50%, transparent)
Alpha8-digit hexFlat on white
10%#afd6211a#F7FBE9
20%#afd62133#EFF7D3
40%#afd62166#DFEFA6
60%#afd62199#CFE67A
80%#afd621cc#BFDE4D

Gradients from #afd621

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, #C4E450, #afd621 45%, #5A6E11);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #afd621, #22BB1D);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #afd621, #4821D6);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #CDE86B 0%, #afd621 45%, #5A6E11 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F9FAF4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #E3A947 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #58E035 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #5A6E11 0%, transparent 65%), #afd621;

Monochromatic scale

Palettes built from #afd621

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.

#afd621 in the real world

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

Industries
SustainabilityFinanceHealth and wellnessAgriculture
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Converts to four-color process without much drama. Proof it anyway.

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 12.46:1.

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.

#afd621, answered

What color is #afd621?

#afd621 is a balanced vivid green, closest to Yellow Green (ΔE2000 4.3). It sits at 73° on the hue wheel with 73% saturation and 48% lightness, which reads as warm.

What is the RGB value of #afd621?

rgb(175, 214, 33) — 175 red, 214 green and 33 blue out of 255, or 68.6% / 83.9% / 12.9% by channel.

What is #afd621 in HSL and HSV?

hsl(73, 73%, 48%) and hsv(73, 85%, 84%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #afd621 a light or a dark color?

It is a light color. Relative luminance is 0.5732 and perceived brightness is 75%, so black text on it reaches 12.46:1.

Should I use black or white text on #afd621?

Black. It scores 12.46:1 against #afd621, versus 1.68:1 for white — AAA at any size.

Is #afd621 accessible on a white background?

#afd621 on white scores 1.68:1, which fails WCAG AA at every size. Darken it to #677E13 to reach 4.5:1, or #4D5F0F for 7:1.

What is the complementary color of #afd621?

#4821D6 sits directly opposite on the wheel. Softer options are the split-complements #2155D6 and #A221D6, which give the same contrast with far less vibration.

What colors go well with #afd621?

For interface work: #F9FAF4 as the surface, #E3EDC0 for borders, #8A9B4B for secondary text, #1C23DB as an accent and #5A6E11 for hover and pressed states. For a palette, the analogous pair #D6A221 and #55D621 stays calm, while #4821D6 is the loudest partner.

What is #afd621 in CMYK for printing?

cmyk(18%, 0%, 85%, 16%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #afd621 warm or cool?

Warm — it scores 36 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #D6BA21; nudged cooler, #6CD81E.

Which Tailwind color is closest to #afd621?

The lime family — its 500 step is #84cc16, ΔE2000 6.6 away. That is a visible difference, so define #afd621 as a custom token rather than reaching for the built-in.

How do I use #afd621 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#afd621] or text-[#afd621], 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 #afd621 with 50% opacity?

rgba(175, 214, 33, 0.5), or #afd62180 in eight-digit hex. Over white that composites to #D7EB90; over black, #586B11.

Is #afd621 a web-safe color?

No. The nearest web-safe colour is #99CC33, ΔE2000 4.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #afd621 mean?

As a green, it reads safe, growing, natural. Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #afd621?

The safest is same-hue elevation: linear-gradient(135deg, #C4E450, #afd621 45%, #5A6E11). For more colour, a short hue run to #22BB1D keeps it rich without turning muddy.

Work with #afd621 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #afd621 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.