#51B440#51B440

#51B440 is a light, vivid green. Relative luminance 0.348; OKLCH L 68.6% C 0.180 H 140.9°. Best body text is #000000 at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#51B440
RGB	rgb(81, 180, 64)
HSL	hsl(111, 48%, 48%)
HSV	hsv(111, 64%, 71%)
CMYK	cmyk(55%, 0%, 64.4%, 29.4%)
CIE-LAB	lab(65.56, -51.03, 48.99)
CIE-LCH	lch(65.56, 70.74, 136.17°)
OKLab	oklab(68.61% -0.1396 0.1135)
OKLCH	oklch(68.61% 0.18 140.9)
XYZ	xyz(20.6391, 34.7603, 10.4713)
Luminance	0.3476 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B440 #A340B4

analogous

#8BB440 #51B440 #40B469

triadic

#51B440 #4051B4 #B44051

tetradic

#51B440 #408BB4 #A340B4 #B46940

square

#51B440 #408BB4 #A340B4 #B46940

split-complementary

#51B440 #6940B4 #B4408B

monochromatic

#285A20 #3D8730 #51B440 #76C968 #9FD995

Accessibility & contrast

On white

2.64

#51B440 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.95

#51B440 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B440

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B440	#FFFFFF	#000000	##000000
##51B440	1.00	2.64	7.95	7.95
#FFFFFF	2.64	1.00	21.00	21.00
#000000	7.95	21.00	1.00	1.00
##000000	7.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9A432

Deuteranopia (green-blind)

#AC9C4A

Tritanopia (blue-blind)

#45AE9C

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51b440;
/* rgb */ color: rgb(81, 180, 64);
/* oklch */ color: oklch(68.6% 0.180 140.9);

Tailwind

colors: {
  custom: {
    50: '#8bcb7a',
    500: '#51b440',
    950: '#000000',
  },
}

SCSS

$custom: #51b440;
$custom-light: #8bcb7a;
$custom-dark: #000000;

JSON

{
  "hex": "#51b440",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 64
  },
  "hsl": {
    "h": 111.207,
    "s": 47.541,
    "l": 47.843
  },
  "oklch": {
    "l": 0.68608,
    "c": 0.17991,
    "h": 140.9
  },
  "luminance": 0.34762
}

Semantic roles & 50–950 ramp

primary

#51B440

secondary

#BC8BC5

accent

#51D7C3

background

#F9FCF7

surface

#F1F9EE

border

#CBD2C9

text

#0D1309

muted

#7E827B

Preview Lab

Preview with #51B440

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →