#81C640#81C640

#81C640 is a light, vivid yellow-green. Relative luminance 0.454; OKLCH L 75.4% C 0.179 H 132.7°. Best body text is #000000 at 10.08:1 contrast (WCAG AA passes).

Color values

HEX	#81C640
RGB	rgb(129, 198, 64)
HSL	hsl(91, 54%, 51%)
HSV	hsv(91, 68%, 78%)
CMYK	cmyk(34.8%, 0%, 67.7%, 22.4%)
CIE-LAB	lab(73.17, -43.27, 57.78)
CIE-LCH	lch(73.17, 72.19, 126.83°)
OKLab	oklab(75.41% -0.1215 0.1315)
OKLCH	oklch(75.41% 0.179 132.7)
XYZ	xyz(30.1723, 45.4242, 12.0275)
Luminance	0.4542 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#81C640 #8540C6

analogous

#C4C640 #81C640 #40C642

triadic

#81C640 #4081C6 #C64081

tetradic

#81C640 #40C4C6 #8540C6 #C64240

square

#81C640 #40C4C6 #8540C6 #C64240

split-complementary

#81C640 #4240C6 #C640C4

monochromatic

#456C20 #639B2E #81C640 #A0D46F #BFE29E

Accessibility & contrast

On white

2.08

#81C640 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.08

#81C640 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #81C640

10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##81C640	#FFFFFF	#000000	##000000
##81C640	1.00	2.08	10.08	10.08
#FFFFFF	2.08	1.00	21.00	21.00
#000000	10.08	21.00	1.00	1.00
##000000	10.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CEB72D

Deuteranopia (green-blind)

#C4B24C

Tritanopia (blue-blind)

#82BEAB

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #81c640;
/* rgb */ color: rgb(129, 198, 64);
/* oklch */ color: oklch(75.4% 0.179 132.7);

Tailwind

colors: {
  custom: {
    50: '#aad77c',
    500: '#81c640',
    950: '#000000',
  },
}

SCSS

$custom: #81c640;
$custom-light: #aad77c;
$custom-dark: #000000;

JSON

{
  "hex": "#81c640",
  "rgb": {
    "r": 129,
    "g": 198,
    "b": 64
  },
  "hsl": {
    "h": 90.896,
    "s": 54.032,
    "l": 51.373
  },
  "oklch": {
    "l": 0.7541,
    "c": 0.17902,
    "h": 132.7
  },
  "luminance": 0.45425
}

Semantic roles & 50–950 ramp

primary

#81C640

secondary

#B293CE

accent

#4ADD96

background

#FAFDF7

surface

#F4FAEE

border

#CED3C9

text

#10140A

muted

#7F837C

Preview Lab

Preview with #81C640

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

Preview Lab → · Contrast checker → · Palette generator →