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green · cool

#4fd591

a balanced, vivid green · cool · closest name: Medium Aqua Marine

Token name suggestion: Studio Moss

RGB
79, 213, 145
HSL
150°, 62%, 57%
CMYK
63, 0, 32, 17
Luminance
0.5130

#4fd591 is a balanced vivid green, 150° on the wheel and 75/100 on the cool side. Put black text on it (11.26:1). As text it scores 1.87:1 on white — use #208552 instead. Nearest name is Medium Aqua Marine, nearest Tailwind family is green.

hsl(150 62% 57%)rgb(79 213 145)Base step 500AAA inkCool

At a glance

Every number on this page in one read: what #4fd591 is made of, how bright it looks, and which way it leans.

Hex
#4fd591
Hue
150°
green
Saturation
62%
vivid
Lightness
57%
balanced
Brightness
84%
HSV value
Perceived
69%
weighted brightness
Luminance
0.5130
WCAG relative
Temperature
Cool
75/100 cool
Color family
Green
Tone
Vivid
Best ink
Black
11.26:1
Closest name
Medium Aqua Marine
ΔE2000 7.6
Chroma
56.9
LCH, 0–130ish
OKLCH L
0.782
perceptual lightness
Tailwind
green
500 · ΔE 7.9
Web-safe
#66CC99
nearest of 216
Where it sits
Hue150° of 360°
Saturation62%
Lightness57%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #4fd591.

Temperature
Warm ← → Cool75% 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%
Green93%
Blue4%

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

Every format

HEX#4fd591
HEX (8-digit)#4fd591ff
RGBrgb(79, 213, 145)
RGBArgba(79, 213, 145, 1)
HSLhsl(150, 62%, 57%)
HSV / HSBhsv(150, 63%, 84%)
HWBhwb(150 31% 16%)
CMYKcmyk(63%, 0%, 32%, 17%)
LABlab(76.9 -52.0 23.1)
LCHlch(76.9 56.9 156.0)
OKLCHoklch(0.782 0.153 157.5)
XYZ (D65)xyz(32.13, 51.29, 34.99)
Decimal5232017
Display P3color(display-p3 0.310 0.835 0.569)
Web-safe#66CC99

Copy-ready code

every platformclick to select
/* CSS */
color: #4fd591;
background-color: #4fd591;
/* CSS custom property */
--brand: #4fd591;
/* Tailwind (arbitrary) */
class="text-[#4fd591] bg-[#4fd591]"
/* SCSS */
$brand: #4fd591;
/* SwiftUI */
Color(red: 0.310, green: 0.835, blue: 0.569)
/* UIKit */
UIColor(red: 0.310, green: 0.835, blue: 0.569, alpha: 1)
/* Android XML */
<color name="brand">#4FD591</color>
/* Android Compose */
Color(0xFF4FD591)
/* Flutter */
Color(0xFF4FD591)
/* Python / OpenCV (BGR) */
(145, 213, 79)
/* Python / PIL (RGB) */
(79, 213, 145)
/* Java AWT */
new Color(79, 213, 145)
/* .NET */
Color.FromArgb(255, 79, 213, 145)
/* OpenGL / Unity (0–1) */
(0.3098f, 0.8353f, 0.5686f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{79,213,145}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #4fd591 85%, white);
border-color: color-mix(in oklab, #4fd591 40%, transparent);
/* theme-aware in one line */
color: light-dark(#19673F, #D3EEE0);
/* relative colour syntax */
--hover: hsl(from #4fd591 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: #F4FBF7;
  --brand-100: #E8F7F0;
  --brand-200: #CCF0DE;
  --brand-300: #A4E9C6;
  --brand-400: #77DFAA;
  --brand-500: #4fd591;
  --brand-600: #2FC679;
  --brand-700: #27A565;
  --brand-800: #1F8451;
  --brand-900: #1B603D;
  --brand-950: #113C26;
  --brand: #4fd591;
  --brand-ink: #000000;
  --brand-surface: #F4FAF7;
  --brand-border: #C0EDD6;
  --brand-hover: #32CE7F;
  --brand-pressed: #2BB26E;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #14241C;
    --brand-ink: #D3EEE0;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4FBF7',
        100: '#E8F7F0',
        200: '#CCF0DE',
        300: '#A4E9C6',
        400: '#77DFAA',
        500: '#4fd591',
        600: '#2FC679',
        700: '#27A565',
        800: '#1F8451',
        900: '#1B603D',
        950: '#113C26',
        DEFAULT: '#4fd591',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4FBF7,
  '100': #E8F7F0,
  '200': #CCF0DE,
  '300': #A4E9C6,
  '400': #77DFAA,
  '500': #4fd591,
  '600': #2FC679,
  '700': #27A565,
  '800': #1F8451,
  '900': #1B603D,
  '950': #113C26,
);
$brand-base: #4fd591;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4FBF7", "$type": "color" },
      "100": { "$value": "#E8F7F0", "$type": "color" },
      "200": { "$value": "#CCF0DE", "$type": "color" },
      "300": { "$value": "#A4E9C6", "$type": "color" },
      "400": { "$value": "#77DFAA", "$type": "color" },
      "500": { "$value": "#4fd591", "$type": "color" },
      "600": { "$value": "#2FC679", "$type": "color" },
      "700": { "$value": "#27A565", "$type": "color" },
      "800": { "$value": "#1F8451", "$type": "color" },
      "900": { "$value": "#1B603D", "$type": "color" },
      "950": { "$value": "#113C26", "$type": "color" }
    },
    "brandInk": { "$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 #4fd591 · 11.26:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.87:1
AA fail · AA large fail · AAA fail
Aa
Black text · 11.26:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #4fd591 as text scores 1.87:1 on white and 11.26:1 on black.
Best tinted ink on it, if plain black or white feels flat: #19673F at 3.69:1.

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
#208552 · 4.63:1
AA on white−25% L
#208552
The quick fox
#18643D · 7.17:1
AAA on white−33% L
#18643D
The quick fox
#4fd591 · 11.26:1
AA on blackalready passes
#4fd591
The quick fox
#4fd591 · 11.26:1
AAA on blackalready passes
#4fd591

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #28A666 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
#4fd591 on white: 1.87:1
AA ✗ fail · AA-large · AAA
Aa
#4fd591 on black: 11.26:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #4fd591 as text on that neutral, and that neutral as text on #4fd591.

NeutralRatioBoth directions
White1.87:1AaAa
Slate 501.78:1AaAa
Slate 1001.70:1AaAa
Slate 2001.51:1AaAa
Slate 3001.26:1AaAa
Slate 4001.37:1AaAa
Slate 5002.55:1AaAa
Slate 6004.06:1AaAa
Slate 7005.55:1AaAa
Slate 8007.84:1AaAa
Slate 9009.57:1AaAa
Black11.26:1AaAa
Colour vision deficiency
true color
protanopia · #D3C58D
deuteranopia · #C2B995
tritanopia · #00D4C3

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. #4fd591 is pinned to step 500; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F4FBF7
#E8F7F0
#CCF0DE
#A4E9C6
#77DFAA
#4fd591
#2FC679
#27A565
#1F8451
#1B603D
#113C26
Base = 500Lightest = 50 · #F4FBF7Darkest = 950 · #113C26Text 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 0.038 157.5);
  --brand-100: oklch(0.94 0.061 157.5);
  --brand-200: oklch(0.88 0.092 157.5);
  --brand-300: oklch(0.80 0.119 157.5);
  --brand-400: oklch(0.72 0.141 157.5);
  --brand-500: oklch(0.64 0.153 157.5);
  --brand-600: oklch(0.56 0.153 157.5);
  --brand-700: oklch(0.48 0.144 157.5);
  --brand-800: oklch(0.40 0.128 157.5);
  --brand-900: oklch(0.32 0.107 157.5);
  --brand-950: oklch(0.24 0.084 157.5);
}

Colors that work with #4fd591

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#F4FAF7
Tinted page background
Border#C0EDD6
Hairlines and dividers
Muted text#4B9B72
Captions on the surface
Accent#D94BB7
Second voice, not a rival
Dark variant#19673F
Hover, pressed, headers
Light variant#EAFAF2
Selected rows, tints
Dark surface#14241C
Dark-mode background
Hover#32CE7F
One step down in lightness
Pressed#2BB26E
Two steps down
Disabled#BFD6CA
Chroma pulled out
Focus ring#56E39B
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 #4fd591

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 #19673F
Safe as a 1px border on white
No — use #28A666

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
  • Weight43/100
  • 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#D54F93
Analogous left#50D54F
Analogous right#4FD5D4
Split-complement 1#D44FD5
Split-complement 2#D54F50
Triadic 1#914FD5
Triadic 2#D5914F
Tetradic#4F50D5
On the wheel
Base+30°−30°+120°+240°+180°150°

#4fd591 sits at 150°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red31.0%
Green83.5%
Blue56.9%
R · 0–255
79
0x4f
G · 0–255
213
0xd5
B · 0–255
145
0x91

CMYK percentages

Cyan62.9%
Magenta0.0%
Yellow31.9%
Key (black)16.5%

Total ink coverage is 111%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#4fd591 text on a black background

contrast 11.26:1

Card sample

#4fd591 text on a white background

contrast 1.87:1

Card sample

#4fd591 on grey

1.70:1

#4fd591 on its own surface

1.76:1

#4fd591 on its dark surface

8.67:1

CSS3 live lab

Text font color

The quick brown fox

color: #4fd591;
Background color
Panel with #4fd591 background
background-color: #4fd591;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #4fd591;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(79, 213, 145, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(79, 213, 145, 0.45);
Border & gradient
Gradient panel
border: 3px solid #4fd591;
background: linear-gradient(135deg, #4fd591, #4FC0D5);
Gradient text

Gradient headline

background: linear-gradient(90deg, #4fd591, #4F9ED5);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #4fd591;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #4fd591;
caret-color: #4fd591;
Left rule
Pull quote or callout
border-left: 4px solid #4fd591;
Ring + tint
Selected chip
background: #EAFAF2;
box-shadow: inset 0 0 0 2px #4fd591;
Conic badge
68%
background: conic-gradient(#4fd591 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #4fd591 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, 213, 145, 0.5)
rgb(79 213 145 / 50%)
#4fd59180
hsl(150 62% 57% / 50%)
color-mix(in srgb, #4fd591 50%, transparent)
Alpha8-digit hexFlat on white
10%#4fd5911a#EDFBF4
20%#4fd59133#DCF7E9
40%#4fd59166#B9EED3
60%#4fd59199#95E6BD
80%#4fd591cc#72DDA7

Gradients from #4fd591

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, #81E1B0, #4fd591 45%, #19673F);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #4fd591, #36AACF);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #4fd591, #D54F93);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #99E7BF 0%, #4fd591 45%, #19673F 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAF7, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #82DF78 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #68D2DB 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #19673F 0%, transparent 65%), #4fd591;

Monochromatic scale

Palettes built from #4fd591

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.

#4fd591 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 11.26:1.

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.

#4fd591, answered

What color is #4fd591?

#4fd591 is a balanced vivid green, closest to Medium Aqua Marine (ΔE2000 7.6). It sits at 150° on the hue wheel with 62% saturation and 57% lightness, which reads as cool.

What is the RGB value of #4fd591?

rgb(79, 213, 145) — 79 red, 213 green and 145 blue out of 255, or 31% / 83.5% / 56.9% by channel.

What is #4fd591 in HSL and HSV?

hsl(150, 62%, 57%) and hsv(150, 63%, 84%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #4fd591 a light or a dark color?

It is a light color. Relative luminance is 0.5130 and perceived brightness is 69%, so black text on it reaches 11.26:1.

Should I use black or white text on #4fd591?

Black. It scores 11.26:1 against #4fd591, versus 1.87:1 for white — AAA at any size.

Is #4fd591 accessible on a white background?

#4fd591 on white scores 1.87:1, which fails WCAG AA at every size. Darken it to #208552 to reach 4.5:1, or #18643D for 7:1.

What is the complementary color of #4fd591?

#D54F93 sits directly opposite on the wheel. Softer options are the split-complements #D44FD5 and #D54F50, which give the same contrast with far less vibration.

What colors go well with #4fd591?

For interface work: #F4FAF7 as the surface, #C0EDD6 for borders, #4B9B72 for secondary text, #D94BB7 as an accent and #19673F for hover and pressed states. For a palette, the analogous pair #50D54F and #4FD5D4 stays calm, while #D54F93 is the loudest partner.

What is #4fd591 in CMYK for printing?

cmyk(63%, 0%, 32%, 17%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #4fd591 warm or cool?

Cool — it scores 75 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #4FD560; nudged cooler, #4DD7C4.

Which Tailwind color is closest to #4fd591?

The green family — its 500 step is #22c55e, ΔE2000 7.9 away. That is a visible difference, so define #4fd591 as a custom token rather than reaching for the built-in.

How do I use #4fd591 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#4fd591] or text-[#4fd591], 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 #4fd591 with 50% opacity?

rgba(79, 213, 145, 0.5), or #4fd59180 in eight-digit hex. Over white that composites to #A7EAC8; over black, #286B49.

Is #4fd591 a web-safe color?

No. The nearest web-safe colour is #66CC99, ΔE2000 4.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #4fd591 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 #4fd591?

The safest is same-hue elevation: linear-gradient(135deg, #81E1B0, #4fd591 45%, #19673F). For more colour, a short hue run to #36AACF keeps it rich without turning muddy.

Work with #4fd591 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #4fd591 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.