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green · cool

#4fac8b

a balanced, soft green · cool · closest name: Medium Sea Green

Token name suggestion: Atlas Fern

RGB
79, 172, 139
HSL
159°, 37%, 49%
CMYK
54, 0, 19, 33
Luminance
0.3303

#4fac8b is a balanced soft green, 159° on the wheel and 79/100 on the cool side. Put black text on it (7.61:1). As text it scores 2.76:1 on white — use #3C8269 instead. Nearest name is Medium Sea Green, nearest Tailwind family is emerald.

hsl(159 37% 49%)rgb(79 172 139)Base step 600AAA inkCool

At a glance

Every number on this page in one read: what #4fac8b is made of, how bright it looks, and which way it leans.

Hex
#4fac8b
Hue
159°
green
Saturation
37%
soft
Lightness
49%
balanced
Brightness
67%
HSV value
Perceived
57%
weighted brightness
Luminance
0.3303
WCAG relative
Temperature
Cool
79/100 cool
Color family
Green
Tone
Soft
Best ink
Black
7.61:1
Closest name
Medium Sea Green
ΔE2000 7.9
Chroma
36.7
LCH, 0–130ish
OKLCH L
0.678
perceptual lightness
Tailwind
emerald
500 · ΔE 6.7
Web-safe
#669999
nearest of 216
Where it sits
Hue159° of 360°
Saturation37%
Lightness49%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #4fac8b.

Temperature
Warm ← → Cool79% 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
Red5%
Green89%
Blue6%

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

Every format

HEX#4fac8b
HEX (8-digit)#4fac8bff
RGBrgb(79, 172, 139)
RGBArgba(79, 172, 139, 1)
HSLhsl(159, 37%, 49%)
HSV / HSBhsv(159, 54%, 67%)
HWBhwb(159 31% 33%)
CMYKcmyk(54%, 0%, 19%, 33%)
LABlab(64.2 -35.7 8.7)
LCHlch(64.2 36.7 166.3)
OKLCHoklch(0.678 0.102 167.4)
XYZ (D65)xyz(22.64, 33.03, 29.60)
Decimal5221515
Display P3color(display-p3 0.310 0.675 0.545)
Web-safe#669999

Copy-ready code

every platformclick to select
/* CSS */
color: #4fac8b;
background-color: #4fac8b;
/* CSS custom property */
--brand: #4fac8b;
/* Tailwind (arbitrary) */
class="text-[#4fac8b] bg-[#4fac8b]"
/* SCSS */
$brand: #4fac8b;
/* SwiftUI */
Color(red: 0.310, green: 0.675, blue: 0.545)
/* UIKit */
UIColor(red: 0.310, green: 0.675, blue: 0.545, alpha: 1)
/* Android XML */
<color name="brand">#4FAC8B</color>
/* Android Compose */
Color(0xFF4FAC8B)
/* Flutter */
Color(0xFF4FAC8B)
/* Python / OpenCV (BGR) */
(139, 172, 79)
/* Python / PIL (RGB) */
(79, 172, 139)
/* Java AWT */
new Color(79, 172, 139)
/* .NET */
Color.FromArgb(255, 79, 172, 139)
/* OpenGL / Unity (0–1) */
(0.3098f, 0.6745f, 0.5451f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{79,172,139}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #4fac8b 85%, white);
border-color: color-mix(in oklab, #4fac8b 40%, transparent);
/* theme-aware in one line */
color: light-dark(#285747, #D5ECE4);
/* relative colour syntax */
--hover: hsl(from #4fac8b 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: #F5FAF8;
  --brand-100: #EBF4F1;
  --brand-200: #D3E9E1;
  --brand-300: #B2DCCD;
  --brand-400: #8CCAB4;
  --brand-500: #65B89B;
  --brand-600: #4fac8b;
  --brand-700: #408C71;
  --brand-800: #33705A;
  --brand-900: #285243;
  --brand-950: #19332A;
  --brand: #4fac8b;
  --brand-ink: #000000;
  --brand-surface: #F5FAF8;
  --brand-border: #C7E5DB;
  --brand-hover: #449477;
  --brand-pressed: #387B63;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #14241E;
    --brand-ink: #D5ECE4;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F5FAF8',
        100: '#EBF4F1',
        200: '#D3E9E1',
        300: '#B2DCCD',
        400: '#8CCAB4',
        500: '#65B89B',
        600: '#4fac8b',
        700: '#408C71',
        800: '#33705A',
        900: '#285243',
        950: '#19332A',
        DEFAULT: '#4fac8b',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F5FAF8,
  '100': #EBF4F1,
  '200': #D3E9E1,
  '300': #B2DCCD,
  '400': #8CCAB4,
  '500': #65B89B,
  '600': #4fac8b,
  '700': #408C71,
  '800': #33705A,
  '900': #285243,
  '950': #19332A,
);
$brand-base: #4fac8b;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F5FAF8", "$type": "color" },
      "100": { "$value": "#EBF4F1", "$type": "color" },
      "200": { "$value": "#D3E9E1", "$type": "color" },
      "300": { "$value": "#B2DCCD", "$type": "color" },
      "400": { "$value": "#8CCAB4", "$type": "color" },
      "500": { "$value": "#65B89B", "$type": "color" },
      "600": { "$value": "#4fac8b", "$type": "color" },
      "700": { "$value": "#408C71", "$type": "color" },
      "800": { "$value": "#33705A", "$type": "color" },
      "900": { "$value": "#285243", "$type": "color" },
      "950": { "$value": "#19332A", "$type": "color" }
    },
    "brandInk": { "$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 #4fac8b · 7.61:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.76:1
AA fail · AA large fail · AAA fail
Aa
Black text · 7.61:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #4fac8b as text scores 2.76:1 on white and 7.61:1 on black.
Best tinted ink on it, if plain black or white feels flat: #285747 at 2.99:1.

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
#3C8269 · 4.58:1
AA on white−12% L
#3C8269
The quick fox
#2C5F4D · 7.37:1
AAA on white−22% L
#2C5F4D
The quick fox
#4fac8b · 7.61:1
AA on blackalready passes
#4fac8b
The quick fox
#4fac8b · 7.61:1
AAA on blackalready passes
#4fac8b

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #4AA282 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
#4fac8b on white: 2.76:1
AA ✗ fail · AA-large · AAA
Aa
#4fac8b on black: 7.61:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #4fac8b as text on that neutral, and that neutral as text on #4fac8b.

NeutralRatioBoth directions
White2.76:1AaAa
Slate 502.64:1AaAa
Slate 1002.52:1AaAa
Slate 2002.24:1AaAa
Slate 3001.86:1AaAa
Slate 4001.08:1AaAa
Slate 5001.72:1AaAa
Slate 6002.74:1AaAa
Slate 7003.75:1AaAa
Slate 8005.30:1AaAa
Slate 9006.47:1AaAa
Black7.61:1AaAa
Colour vision deficiency
true color
protanopia · #A8A289
deuteranopia · #9A978D
tritanopia · #27ADA3

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. #4fac8b 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.

#F5FAF8
#EBF4F1
#D3E9E1
#B2DCCD
#8CCAB4
#65B89B
#4fac8b
#408C71
#33705A
#285243
#19332A
Base = 600Lightest = 50 · #F5FAF8Darkest = 950 · #19332AText 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 0.026 167.4);
  --brand-100: oklch(0.94 0.041 167.4);
  --brand-200: oklch(0.88 0.061 167.4);
  --brand-300: oklch(0.80 0.080 167.4);
  --brand-400: oklch(0.72 0.094 167.4);
  --brand-500: oklch(0.64 0.102 167.4);
  --brand-600: oklch(0.56 0.102 167.4);
  --brand-700: oklch(0.48 0.096 167.4);
  --brand-800: oklch(0.40 0.086 167.4);
  --brand-900: oklch(0.32 0.072 167.4);
  --brand-950: oklch(0.24 0.056 167.4);
}

Colors that work with #4fac8b

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#F5FAF8
Tinted page background
Border#C7E5DB
Hairlines and dividers
Muted text#4B9B7E
Captions on the surface
Accent#B14A88
Second voice, not a rival
Dark variant#285747
Hover, pressed, headers
Light variant#EEF7F4
Selected rows, tints
Dark surface#14241E
Dark-mode background
Hover#449477
One step down in lightness
Pressed#387B63
Two steps down
Disabled#A5C6BA
Chroma pulled out
Focus ring#4FC098
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 #4fac8b

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

Works well for
  • Text and icons on dark surfaces
  • Charts, tags and secondary surfaces
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • 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 #285747
Safe as a 1px border on white
No — use #4AA282

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.

The muted chroma softens the association — it reads considered rather than loud, which suits long-form and data-heavy screens. 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
  • Weight51/100
  • 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#AC4F70
Analogous left#4FAC5C
Analogous right#4F9FAC
Split-complement 1#AC4F9F
Split-complement 2#AC5C4F
Triadic 1#8B4FAC
Triadic 2#AC8B4F
Tetradic#5C4FAC
On the wheel
Base+30°−30°+120°+240°+180°159°

#4fac8b sits at 159°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red31.0%
Green67.5%
Blue54.5%
R · 0–255
79
0x4f
G · 0–255
172
0xac
B · 0–255
139
0x8b

CMYK percentages

Cyan54.1%
Magenta0.0%
Yellow19.2%
Key (black)32.5%

Total ink coverage is 106%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#4fac8b text on a black background

contrast 7.61:1

Card sample

#4fac8b text on a white background

contrast 2.76:1

Card sample

#4fac8b on grey

2.52:1

#4fac8b on its own surface

2.62:1

#4fac8b on its dark surface

5.85:1

CSS3 live lab

Text font color

The quick brown fox

color: #4fac8b;
Background color
Panel with #4fac8b background
background-color: #4fac8b;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #4fac8b;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(79, 172, 139, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(79, 172, 139, 0.45);
Border & gradient
Gradient panel
border: 3px solid #4fac8b;
background: linear-gradient(135deg, #4fac8b, #4F8FAC);
Gradient text

Gradient headline

background: linear-gradient(90deg, #4fac8b, #4F78AC);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #4fac8b;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #4fac8b;
caret-color: #4fac8b;
Left rule
Pull quote or callout
border-left: 4px solid #4fac8b;
Ring + tint
Selected chip
background: #EEF7F4;
box-shadow: inset 0 0 0 2px #4fac8b;
Conic badge
68%
background: conic-gradient(#4fac8b 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #4fac8b 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(79, 172, 139, 0.5)
rgb(79 172 139 / 50%)
#4fac8b80
hsl(159 37% 49% / 50%)
color-mix(in srgb, #4fac8b 50%, transparent)
Alpha8-digit hexFlat on white
10%#4fac8b1a#EDF7F3
20%#4fac8b33#DCEEE8
40%#4fac8b66#B9DED1
60%#4fac8b99#95CDB9
80%#4fac8bcc#72BDA2

Gradients from #4fac8b

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, #77C1A7, #4fac8b 45%, #285747);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #4fac8b, #457797);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #4fac8b, #AC4F70);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #8CCAB4 0%, #4fac8b 45%, #285747 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F5FAF8, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #70BE75 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #62A4B7 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #285747 0%, transparent 65%), #4fac8b;

Monochromatic scale

Palettes built from #4fac8b

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.

#4fac8b 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 7.61:1.

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.

#4fac8b, answered

What color is #4fac8b?

#4fac8b is a balanced soft green, closest to Medium Sea Green (ΔE2000 7.9). It sits at 159° on the hue wheel with 37% saturation and 49% lightness, which reads as cool.

What is the RGB value of #4fac8b?

rgb(79, 172, 139) — 79 red, 172 green and 139 blue out of 255, or 31% / 67.5% / 54.5% by channel.

What is #4fac8b in HSL and HSV?

hsl(159, 37%, 49%) and hsv(159, 54%, 67%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #4fac8b a light or a dark color?

It is a mid-tone. Relative luminance is 0.3303 and perceived brightness is 57%, so black text on it reaches 7.61:1.

Should I use black or white text on #4fac8b?

Black. It scores 7.61:1 against #4fac8b, versus 2.76:1 for white — AAA at any size.

Is #4fac8b accessible on a white background?

#4fac8b on white scores 2.76:1, which fails WCAG AA at every size. Darken it to #3C8269 to reach 4.5:1, or #2C5F4D for 7:1.

What is the complementary color of #4fac8b?

#AC4F70 sits directly opposite on the wheel. Softer options are the split-complements #AC4F9F and #AC5C4F, which give the same contrast with far less vibration.

What colors go well with #4fac8b?

For interface work: #F5FAF8 as the surface, #C7E5DB for borders, #4B9B7E for secondary text, #B14A88 as an accent and #285747 for hover and pressed states. For a palette, the analogous pair #4FAC5C and #4F9FAC stays calm, while #AC4F70 is the loudest partner.

What is #4fac8b in CMYK for printing?

cmyk(54%, 0%, 19%, 33%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #4fac8b warm or cool?

Cool — it scores 79 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #4FAC69; nudged cooler, #4CADAF.

Which Tailwind color is closest to #4fac8b?

The emerald family — its 500 step is #10b981, ΔE2000 6.7 away. That is a visible difference, so define #4fac8b as a custom token rather than reaching for the built-in.

How do I use #4fac8b in Tailwind CSS?

Inline it as an arbitrary value with bg-[#4fac8b] or text-[#4fac8b], 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 #4fac8b with 50% opacity?

rgba(79, 172, 139, 0.5), or #4fac8b80 in eight-digit hex. Over white that composites to #A7D6C5; over black, #285646.

Is #4fac8b a web-safe color?

No. The nearest web-safe colour is #669999, ΔE2000 13.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #4fac8b 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 moderate chroma the association is present but not shouted.

What gradient works with #4fac8b?

The safest is same-hue elevation: linear-gradient(135deg, #77C1A7, #4fac8b 45%, #285747). For more colour, a short hue run to #457797 keeps it rich without turning muddy.

Work with #4fac8b in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #4fac8b at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.