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green · cool

#28724f

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

Token name suggestion: Slate Jade

RGB
40, 114, 79
HSL
152°, 48%, 30%
CMYK
65, 0, 31, 55
Luminance
0.1305

#28724f is a dark vivid green, 152° on the wheel and 76/100 on the cool side. Put white text on it (5.82:1). As text it scores 5.82:1 on white — safe at any size. Nearest name is Sea Green, nearest Tailwind family is neutral.

hsl(152 48% 30%)rgb(40 114 79)Base step 800AA inkCool

At a glance

Every number on this page in one read: what #28724f is made of, how bright it looks, and which way it leans.

Hex
#28724f
Hue
152°
green
Saturation
48%
vivid
Lightness
30%
dark
Brightness
45%
HSV value
Perceived
37%
weighted brightness
Luminance
0.1305
WCAG relative
Temperature
Cool
76/100 cool
Color family
Green
Tone
Vivid
Best ink
White
5.82:1
Closest name
Sea Green
ΔE2000 9.5
Chroma
34.3
LCH, 0–130ish
OKLCH L
0.496
perceptual lightness
Tailwind
neutral
500 · ΔE 23.1
Web-safe
#336666
nearest of 216
Where it sits
Hue152° of 360°
Saturation48%
Lightness30%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #28724f.

Temperature
Warm ← → Cool76% 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
Red3%
Green92%
Blue4%

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

Every format

HEX#28724f
HEX (8-digit)#28724fff
RGBrgb(40, 114, 79)
RGBArgba(40, 114, 79, 1)
HSLhsl(152, 48%, 30%)
HSV / HSBhsv(152, 65%, 45%)
HWBhwb(152 16% 55%)
CMYKcmyk(65%, 0%, 31%, 55%)
LABlab(42.8 -31.8 12.8)
LCHlch(42.8 34.3 158.0)
OKLCHoklch(0.496 0.093 159.4)
XYZ (D65)xyz(8.30, 13.05, 9.48)
Decimal2650703
Display P3color(display-p3 0.157 0.447 0.310)
Web-safe#336666

Copy-ready code

every platformclick to select
/* CSS */
color: #28724f;
background-color: #28724f;
/* CSS custom property */
--brand: #28724f;
/* Tailwind (arbitrary) */
class="text-[#28724f] bg-[#28724f]"
/* SCSS */
$brand: #28724f;
/* SwiftUI */
Color(red: 0.157, green: 0.447, blue: 0.310)
/* UIKit */
UIColor(red: 0.157, green: 0.447, blue: 0.310, alpha: 1)
/* Android XML */
<color name="brand">#28724F</color>
/* Android Compose */
Color(0xFF28724F)
/* Flutter */
Color(0xFF28724F)
/* Python / OpenCV (BGR) */
(79, 114, 40)
/* Python / PIL (RGB) */
(40, 114, 79)
/* Java AWT */
new Color(40, 114, 79)
/* .NET */
Color.FromArgb(255, 40, 114, 79)
/* OpenGL / Unity (0–1) */
(0.1569f, 0.4471f, 0.3098f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{40,114,79}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #28724f 85%, white);
border-color: color-mix(in oklab, #28724f 40%, transparent);
/* theme-aware in one line */
color: light-dark(#215E41, #D3EEE1);
/* relative colour syntax */
--hover: hsl(from #28724f 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: #F4FAF8;
  --brand-100: #EAF5F0;
  --brand-200: #D0ECDF;
  --brand-300: #ACE2C8;
  --brand-400: #82D3AD;
  --brand-500: #59C592;
  --brand-600: #40B57E;
  --brand-700: #359769;
  --brand-800: #28724f;
  --brand-900: #22583F;
  --brand-950: #153727;
  --brand: #28724f;
  --brand-ink: #ffffff;
  --brand-surface: #F4FAF8;
  --brand-border: #C3EAD7;
  --brand-hover: #1F583D;
  --brand-pressed: #153D2A;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #14241C;
    --brand-ink: #D3EEE1;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4FAF8',
        100: '#EAF5F0',
        200: '#D0ECDF',
        300: '#ACE2C8',
        400: '#82D3AD',
        500: '#59C592',
        600: '#40B57E',
        700: '#359769',
        800: '#28724f',
        900: '#22583F',
        950: '#153727',
        DEFAULT: '#28724f',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4FAF8,
  '100': #EAF5F0,
  '200': #D0ECDF,
  '300': #ACE2C8,
  '400': #82D3AD,
  '500': #59C592,
  '600': #40B57E,
  '700': #359769,
  '800': #28724f,
  '900': #22583F,
  '950': #153727,
);
$brand-base: #28724f;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4FAF8", "$type": "color" },
      "100": { "$value": "#EAF5F0", "$type": "color" },
      "200": { "$value": "#D0ECDF", "$type": "color" },
      "300": { "$value": "#ACE2C8", "$type": "color" },
      "400": { "$value": "#82D3AD", "$type": "color" },
      "500": { "$value": "#59C592", "$type": "color" },
      "600": { "$value": "#40B57E", "$type": "color" },
      "700": { "$value": "#359769", "$type": "color" },
      "800": { "$value": "#28724f", "$type": "color" },
      "900": { "$value": "#22583F", "$type": "color" },
      "950": { "$value": "#153727", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$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#ffffff on #28724f · 5.82:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 5.82:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.61:1
AA fail · AA large pass · AAA fail
Reading the other direction: #28724f as text scores 5.82:1 on white and 3.61:1 on black.
Best tinted ink on it, if plain black or white feels flat: #ECF8F3 at 5.34:1.

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
#28724f · 5.82:1
AA on whitealready passes
#28724f
The quick fox
#236345 · 7.14:1
AAA on white−4% L
#236345
The quick fox
#2F855C · 4.63:1
AA on black+5% L
#2F855C
The quick fox
#3CAB76 · 7.28:1
AAA on black+15% L
#3CAB76

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #28724F 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
#28724f on white: 5.82:1
AA ✓ pass · AA-large · AAA
Aa
#28724f on black: 3.61:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #28724f as text on that neutral, and that neutral as text on #28724f.

NeutralRatioBoth directions
White5.82:1AaAa
Slate 505.56:1AaAa
Slate 1005.31:1AaAa
Slate 2004.72:1AaAa
Slate 3003.92:1AaAa
Slate 4002.27:1AaAa
Slate 5001.22:1AaAa
Slate 6001.30:1AaAa
Slate 7001.78:1AaAa
Slate 8002.51:1AaAa
Slate 9003.07:1AaAa
Black3.61:1AaAa
Colour vision deficiency
true color
protanopia · #71694D
deuteranopia · #676251
tritanopia · #007169

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. #28724f is pinned to step 800; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F4FAF8
#EAF5F0
#D0ECDF
#ACE2C8
#82D3AD
#59C592
#40B57E
#359769
#28724f
#22583F
#153727
Base = 800Lightest = 50 · #F4FAF8Darkest = 950 · #153727Text 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 0.023 159.4);
  --brand-100: oklch(0.94 0.037 159.4);
  --brand-200: oklch(0.88 0.056 159.4);
  --brand-300: oklch(0.80 0.072 159.4);
  --brand-400: oklch(0.72 0.085 159.4);
  --brand-500: oklch(0.64 0.093 159.4);
  --brand-600: oklch(0.56 0.093 159.4);
  --brand-700: oklch(0.48 0.087 159.4);
  --brand-800: oklch(0.40 0.078 159.4);
  --brand-900: oklch(0.32 0.065 159.4);
  --brand-950: oklch(0.24 0.051 159.4);
}

Colors that work with #28724f

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

Text on it#ffffff
White wins here
Surface#F4FAF8
Tinted page background
Border#C3EAD7
Hairlines and dividers
Muted text#4B9B75
Captions on the surface
Accent#75255F
Second voice, not a rival
Dark variant#215E41
Hover, pressed, headers
Light variant#ECF8F3
Selected rows, tints
Dark surface#14241C
Dark-mode background
Hover#1F583D
One step down in lightness
Pressed#153D2A
Two steps down
Disabled#6AA087
Chroma pulled out
Focus ring#258A5A
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 #28724f

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

Works well for
  • Body text and links on white
  • 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
  • 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
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

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
  • Weight70/100
  • TemperatureCool
  • ApproachabilityReserved

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#72284B
Analogous left#28722A
Analogous right#287072
Split-complement 1#722870
Split-complement 2#722A28
Triadic 1#4F2872
Triadic 2#724F28
Tetradic#2A2872
On the wheel
Base+30°−30°+120°+240°+180°152°

#28724f sits at 152°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red15.7%
Green44.7%
Blue31.0%
R · 0–255
40
0x28
G · 0–255
114
0x72
B · 0–255
79
0x4f

CMYK percentages

Cyan64.9%
Magenta0.0%
Yellow30.7%
Key (black)55.3%

Total ink coverage is 151%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#28724f text on a black background

contrast 3.61:1

Card sample

#28724f text on a white background

contrast 5.82:1

Card sample

#28724f on grey

5.31:1

#28724f on its own surface

5.51:1

#28724f on its dark surface

2.78:1

CSS3 live lab

Text font color

The quick brown fox

color: #28724f;
Background color
Panel with #28724f background
background-color: #28724f;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #28724f;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(40, 114, 79, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(40, 114, 79, 0.45);
Border & gradient
Gradient panel
border: 3px solid #28724f;
background: linear-gradient(135deg, #28724f, #286472);
Gradient text

Gradient headline

background: linear-gradient(90deg, #28724f, #285172);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #28724f;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #28724f;
caret-color: #28724f;
Left rule
Pull quote or callout
border-left: 4px solid #28724f;
Ring + tint
Selected chip
background: #ECF8F3;
box-shadow: inset 0 0 0 2px #28724f;
Conic badge
68%
background: conic-gradient(#28724f 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #28724f 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(40, 114, 79, 0.5)
rgb(40 114 79 / 50%)
#28724f80
hsl(152 48% 30% / 50%)
color-mix(in srgb, #28724f 50%, transparent)
Alpha8-digit hexFlat on white
10%#28724f1a#EAF1ED
20%#28724f33#D4E3DC
40%#28724f66#A9C7B9
60%#28724f99#7EAA95
80%#28724fcc#538E72

Gradients from #28724f

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, #389F6E, #28724f 45%, #215E41);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #28724f, #204B5B);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #28724f, #72284B);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #40B67E 0%, #28724f 45%, #215E41 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAF8, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #3B9835 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #307F89 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #215E41 0%, transparent 65%), #28724f;

Monochromatic scale

Palettes built from #28724f

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.

#28724f 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

Too dim on dark surfaces at 3.61:1 — lift it to #2F855C for body text, or reserve it for fills.

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.

#28724f, answered

What color is #28724f?

#28724f is a dark vivid green, closest to Sea Green (ΔE2000 9.5). It sits at 152° on the hue wheel with 48% saturation and 30% lightness, which reads as cool.

What is the RGB value of #28724f?

rgb(40, 114, 79) — 40 red, 114 green and 79 blue out of 255, or 15.7% / 44.7% / 31% by channel.

What is #28724f in HSL and HSV?

hsl(152, 48%, 30%) and hsv(152, 65%, 45%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #28724f a light or a dark color?

It is a dark color. Relative luminance is 0.1305 and perceived brightness is 37%, so white text on it reaches 5.82:1.

Should I use black or white text on #28724f?

White. It scores 5.82:1 against #28724f, versus 3.61:1 for black — AA at any size.

Is #28724f accessible on a white background?

#28724f on white scores 5.82:1, which clears AA at every size but not AAA.

What is the complementary color of #28724f?

#72284B sits directly opposite on the wheel. Softer options are the split-complements #722870 and #722A28, which give the same contrast with far less vibration.

What colors go well with #28724f?

For interface work: #F4FAF8 as the surface, #C3EAD7 for borders, #4B9B75 for secondary text, #75255F as an accent and #215E41 for hover and pressed states. For a palette, the analogous pair #28722A and #287072 stays calm, while #72284B is the loudest partner.

What is #28724f in CMYK for printing?

cmyk(65%, 0%, 31%, 55%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #28724f warm or cool?

Cool — it scores 76 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #287234; nudged cooler, #26746B.

Which Tailwind color is closest to #28724f?

The neutral family — its 500 step is #737373, ΔE2000 23.1 away. That is a visible difference, so define #28724f as a custom token rather than reaching for the built-in.

How do I use #28724f in Tailwind CSS?

Inline it as an arbitrary value with bg-[#28724f] or text-[#28724f], 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 #28724f with 50% opacity?

rgba(40, 114, 79, 0.5), or #28724f80 in eight-digit hex. Over white that composites to #94B9A7; over black, #143928.

Is #28724f a web-safe color?

No. The nearest web-safe colour is #336666, ΔE2000 14.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #28724f 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 #28724f?

The safest is same-hue elevation: linear-gradient(135deg, #389F6E, #28724f 45%, #215E41). For more colour, a short hue run to #204B5B keeps it rich without turning muddy.

Work with #28724f in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #28724f at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.