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green · cool

#27ad21

a dark, vivid green · cool · closest name: Lime Green

Token name suggestion: Shadow Moss

RGB
39, 173, 33
HSL
117°, 68%, 40%
CMYK
78, 0, 81, 32
Luminance
0.3043

#27ad21 is a dark vivid green, 117° on the wheel and 61/100 on the cool side. Put black text on it (7.09:1). As text it scores 2.96:1 on white — use #1E871A instead. Nearest name is Lime Green, nearest Tailwind family is green.

hsl(117 68% 40%)rgb(39 173 33)Base step 700AAA inkCool

At a glance

Every number on this page in one read: what #27ad21 is made of, how bright it looks, and which way it leans.

Hex
#27ad21
Hue
117°
green
Saturation
68%
vivid
Lightness
40%
dark
Brightness
68%
HSV value
Perceived
53%
weighted brightness
Luminance
0.3043
WCAG relative
Temperature
Cool
61/100 cool
Color family
Green
Tone
Vivid
Best ink
Black
7.09:1
Closest name
Lime Green
ΔE2000 8.7
Chroma
82.3
LCH, 0–130ish
OKLCH L
0.653
perceptual lightness
Tailwind
green
500 · ΔE 8.7
Web-safe
#339933
nearest of 216
Where it sits
Hue117° of 360°
Saturation68%
Lightness40%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #27ad21.

Temperature
Warm ← → Cool61% cool

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

Luminance by channel
Red1%
Green98%
Blue0%

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

Every format

HEX#27ad21
HEX (8-digit)#27ad21ff
RGBrgb(39, 173, 33)
RGBArgba(39, 173, 33, 1)
HSLhsl(117, 68%, 40%)
HSV / HSBhsv(117, 81%, 68%)
HWBhwb(117 13% 32%)
CMYKcmyk(78%, 0%, 81%, 32%)
LABlab(62.0 -59.9 56.5)
LCHlch(62.0 82.3 136.7)
OKLCHoklch(0.653 0.206 142.4)
XYZ (D65)xyz(16.05, 30.43, 6.47)
Decimal2600225
Display P3color(display-p3 0.153 0.678 0.129)
Web-safe#339933

Copy-ready code

every platformclick to select
/* CSS */
color: #27ad21;
background-color: #27ad21;
/* CSS custom property */
--brand: #27ad21;
/* Tailwind (arbitrary) */
class="text-[#27ad21] bg-[#27ad21]"
/* SCSS */
$brand: #27ad21;
/* SwiftUI */
Color(red: 0.153, green: 0.678, blue: 0.129)
/* UIKit */
UIColor(red: 0.153, green: 0.678, blue: 0.129, alpha: 1)
/* Android XML */
<color name="brand">#27AD21</color>
/* Android Compose */
Color(0xFF27AD21)
/* Flutter */
Color(0xFF27AD21)
/* Python / OpenCV (BGR) */
(33, 173, 39)
/* Python / PIL (RGB) */
(39, 173, 33)
/* Java AWT */
new Color(39, 173, 33)
/* .NET */
Color.FromArgb(255, 39, 173, 33)
/* OpenGL / Unity (0–1) */
(0.1529f, 0.6784f, 0.1294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{39,173,33}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #27ad21 85%, white);
border-color: color-mix(in oklab, #27ad21 40%, transparent);
/* theme-aware in one line */
color: light-dark(#186B14, #D4EED3);
/* relative colour syntax */
--hover: hsl(from #27ad21 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: #F4FBF3;
  --brand-100: #E8F8E8;
  --brand-200: #CCF2CA;
  --brand-300: #A4EDA1;
  --brand-400: #77E472;
  --brand-500: #49DB43;
  --brand-600: #2ECE27;
  --brand-700: #27ad21;
  --brand-800: #1F891A;
  --brand-900: #1A6317;
  --brand-950: #103E0E;
  --brand: #27ad21;
  --brand-ink: #000000;
  --brand-surface: #F5FAF4;
  --brand-border: #C2EDC0;
  --brand-hover: #208F1B;
  --brand-pressed: #1A7116;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142414;
    --brand-ink: #D4EED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4FBF3',
        100: '#E8F8E8',
        200: '#CCF2CA',
        300: '#A4EDA1',
        400: '#77E472',
        500: '#49DB43',
        600: '#2ECE27',
        700: '#27ad21',
        800: '#1F891A',
        900: '#1A6317',
        950: '#103E0E',
        DEFAULT: '#27ad21',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4FBF3,
  '100': #E8F8E8,
  '200': #CCF2CA,
  '300': #A4EDA1,
  '400': #77E472,
  '500': #49DB43,
  '600': #2ECE27,
  '700': #27ad21,
  '800': #1F891A,
  '900': #1A6317,
  '950': #103E0E,
);
$brand-base: #27ad21;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4FBF3", "$type": "color" },
      "100": { "$value": "#E8F8E8", "$type": "color" },
      "200": { "$value": "#CCF2CA", "$type": "color" },
      "300": { "$value": "#A4EDA1", "$type": "color" },
      "400": { "$value": "#77E472", "$type": "color" },
      "500": { "$value": "#49DB43", "$type": "color" },
      "600": { "$value": "#2ECE27", "$type": "color" },
      "700": { "$value": "#27ad21", "$type": "color" },
      "800": { "$value": "#1F891A", "$type": "color" },
      "900": { "$value": "#1A6317", "$type": "color" },
      "950": { "$value": "#103E0E", "$type": "color" }
    },
    "brandInk": { "$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 #27ad21 · 7.09:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.96:1
AA fail · AA large fail · AAA fail
Aa
Black text · 7.09:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #27ad21 as text scores 2.96:1 on white and 7.09:1 on black.
Best tinted ink on it, if plain black or white feels flat: #186B14 at 2.25:1.

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
#1E871A · 4.63:1
AA on white−9% L
#1E871A
The quick fox
#176413 · 7.32:1
AAA on white−17% L
#176413
The quick fox
#27ad21 · 7.09:1
AA on blackalready passes
#27ad21
The quick fox
#27ad21 · 7.09:1
AAA on blackalready passes
#27ad21

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #26A920 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
#27ad21 on white: 2.96:1
AA ✗ fail · AA-large · AAA
Aa
#27ad21 on black: 7.09:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #27ad21 as text on that neutral, and that neutral as text on #27ad21.

NeutralRatioBoth directions
White2.96:1AaAa
Slate 502.83:1AaAa
Slate 1002.71:1AaAa
Slate 2002.40:1AaAa
Slate 3002.00:1AaAa
Slate 4001.16:1AaAa
Slate 5001.61:1AaAa
Slate 6002.56:1AaAa
Slate 7003.49:1AaAa
Slate 8004.94:1AaAa
Slate 9006.02:1AaAa
Black7.09:1AaAa
Colour vision deficiency
true color
protanopia · #B19C00
deuteranopia · #A29232
tritanopia · #00A893

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. #27ad21 is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F4FBF3
#E8F8E8
#CCF2CA
#A4EDA1
#77E472
#49DB43
#2ECE27
#27ad21
#1F891A
#1A6317
#103E0E
Base = 700Lightest = 50 · #F4FBF3Darkest = 950 · #103E0EText step on white = 800
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 0.051 142.4);
  --brand-100: oklch(0.94 0.082 142.4);
  --brand-200: oklch(0.88 0.123 142.4);
  --brand-300: oklch(0.80 0.160 142.4);
  --brand-400: oklch(0.72 0.189 142.4);
  --brand-500: oklch(0.64 0.206 142.4);
  --brand-600: oklch(0.56 0.206 142.4);
  --brand-700: oklch(0.48 0.193 142.4);
  --brand-800: oklch(0.40 0.173 142.4);
  --brand-900: oklch(0.32 0.144 142.4);
  --brand-950: oklch(0.24 0.113 142.4);
}

Colors that work with #27ad21

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#F5FAF4
Tinted page background
Border#C2EDC0
Hairlines and dividers
Muted text#4E9B4B
Captions on the surface
Accent#861DB1
Second voice, not a rival
Dark variant#186B14
Hover, pressed, headers
Light variant#EAFBEA
Selected rows, tints
Dark surface#142414
Dark-mode background
Hover#208F1B
One step down in lightness
Pressed#1A7116
Two steps down
Disabled#8CB48A
Chroma pulled out
Focus ring#21CA19
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 #27ad21

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
  • Headers, footers and dark-mode surfaces
  • 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
  • Black text placed on it
  • 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 #186B14
Safe as a 1px border on white
No — use #26A920

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 low lightness adds weight and formality.

Worth knowing

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

Reads as
  • FormalityHigh
  • EnergyMedium-high
  • Weight60/100
  • TemperatureCool
  • ApproachabilityBalanced

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#A721AD
Analogous left#6DAD21
Analogous right#21AD61
Split-complement 1#6121AD
Split-complement 2#AD216D
Triadic 1#2127AD
Triadic 2#AD2127
Tetradic#216DAD
On the wheel
Base+30°−30°+120°+240°+180°117°

#27ad21 sits at 117°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red15.3%
Green67.8%
Blue12.9%
R · 0–255
39
0x27
G · 0–255
173
0xad
B · 0–255
33
0x21

CMYK percentages

Cyan77.5%
Magenta0.0%
Yellow80.9%
Key (black)32.2%

Total ink coverage is 191%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#27ad21 text on a black background

contrast 7.09:1

Card sample

#27ad21 text on a white background

contrast 2.96:1

Card sample

#27ad21 on grey

2.71:1

#27ad21 on its own surface

2.80:1

#27ad21 on its dark surface

5.48:1

CSS3 live lab

Text font color

The quick brown fox

color: #27ad21;
Background color
Panel with #27ad21 background
background-color: #27ad21;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #27ad21;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(39, 173, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(39, 173, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #27ad21;
background: linear-gradient(135deg, #27ad21, #21AD78);
Gradient text

Gradient headline

background: linear-gradient(90deg, #27ad21, #21AD9B);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #27ad21;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #27ad21;
caret-color: #27ad21;
Left rule
Pull quote or callout
border-left: 4px solid #27ad21;
Ring + tint
Selected chip
background: #EAFBEA;
box-shadow: inset 0 0 0 2px #27ad21;
Conic badge
68%
background: conic-gradient(#27ad21 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #27ad21 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(39, 173, 33, 0.5)
rgb(39 173 33 / 50%)
#27ad2180
hsl(117 68% 40% / 50%)
color-mix(in srgb, #27ad21 50%, transparent)
Alpha8-digit hexFlat on white
10%#27ad211a#E9F7E9
20%#27ad2133#D4EFD3
40%#27ad2166#A9DEA6
60%#27ad2199#7DCE7A
80%#27ad21cc#52BD4D

Gradients from #27ad21

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, #3AD833, #27ad21 45%, #186B14);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #27ad21, #1C9370);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #27ad21, #A721AD);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #53DD4D 0%, #27ad21 45%, #186B14 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F5FAF4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #96D72B 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #26C77D 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #186B14 0%, transparent 65%), #27ad21;

Monochromatic scale

Palettes built from #27ad21

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.

#27ad21 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 7.09:1.

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.

#27ad21, answered

What color is #27ad21?

#27ad21 is a dark vivid green, closest to Lime Green (ΔE2000 8.7). It sits at 117° on the hue wheel with 68% saturation and 40% lightness, which reads as cool.

What is the RGB value of #27ad21?

rgb(39, 173, 33) — 39 red, 173 green and 33 blue out of 255, or 15.3% / 67.8% / 12.9% by channel.

What is #27ad21 in HSL and HSV?

hsl(117, 68%, 40%) and hsv(117, 81%, 68%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #27ad21 a light or a dark color?

It is a mid-tone. Relative luminance is 0.3043 and perceived brightness is 53%, so black text on it reaches 7.09:1.

Should I use black or white text on #27ad21?

Black. It scores 7.09:1 against #27ad21, versus 2.96:1 for white — AAA at any size.

Is #27ad21 accessible on a white background?

#27ad21 on white scores 2.96:1, which fails WCAG AA at every size. Darken it to #1E871A to reach 4.5:1, or #176413 for 7:1.

What is the complementary color of #27ad21?

#A721AD sits directly opposite on the wheel. Softer options are the split-complements #6121AD and #AD216D, which give the same contrast with far less vibration.

What colors go well with #27ad21?

For interface work: #F5FAF4 as the surface, #C2EDC0 for borders, #4E9B4B for secondary text, #861DB1 as an accent and #186B14 for hover and pressed states. For a palette, the analogous pair #6DAD21 and #21AD61 stays calm, while #A721AD is the loudest partner.

What is #27ad21 in CMYK for printing?

cmyk(78%, 0%, 81%, 32%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #27ad21 warm or cool?

Cool — it scores 61 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #5AAD21; nudged cooler, #1FAF4E.

Which Tailwind color is closest to #27ad21?

The green family — its 500 step is #22c55e, ΔE2000 8.7 away. That is a visible difference, so define #27ad21 as a custom token rather than reaching for the built-in.

How do I use #27ad21 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#27ad21] or text-[#27ad21], 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 #27ad21 with 50% opacity?

rgba(39, 173, 33, 0.5), or #27ad2180 in eight-digit hex. Over white that composites to #93D690; over black, #145711.

Is #27ad21 a web-safe color?

No. The nearest web-safe colour is #339933, ΔE2000 6.8 away. The palette only matters for legacy displays and some email clients now.

What does the color #27ad21 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 #27ad21?

The safest is same-hue elevation: linear-gradient(135deg, #3AD833, #27ad21 45%, #186B14). For more colour, a short hue run to #1C9370 keeps it rich without turning muddy.

Work with #27ad21 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #27ad21 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.