#81CF31#81CF31

#81CF31 is a light, vivid yellow-green. Relative luminance 0.495; OKLCH L 77.5% C 0.199 H 132.8°. Best body text is #000000 at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#81CF31
RGB	rgb(129, 207, 49)
HSL	hsl(90, 62%, 50%)
HSV	hsv(90, 76%, 81%)
CMYK	cmyk(37.7%, 0%, 76.3%, 18.8%)
CIE-LAB	lab(75.77, -48.01, 65.70)
CIE-LCH	lch(75.77, 81.37, 126.16°)
OKLab	oklab(77.5% -0.1354 0.146)
OKLCH	oklch(77.5% 0.199 132.8)
XYZ	xyz(31.9200, 49.5131, 10.7802)
Luminance	0.4951 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#81CF31 #7F31CF

analogous

#CFCE31 #81CF31 #32CF31

triadic

#81CF31 #3181CF #CF3181

tetradic

#81CF31 #31CFCE #7F31CF #CF3132

square

#81CF31 #31CFCE #7F31CF #CF3132

split-complementary

#81CF31 #3132CF #CE31CF

monochromatic

#436C19 #629E25 #81CF31 #9FDB63 #BEE694

Accessibility & contrast

On white

1.93

#81CF31 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.90

#81CF31 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #81CF31

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##81CF31	#FFFFFF	#000000	##000000
##81CF31	1.00	1.93	10.90	10.90
#FFFFFF	1.93	1.00	21.00	21.00
#000000	10.90	21.00	1.00	1.00
##000000	10.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D8BF05

Deuteranopia (green-blind)

#CDB942

Tritanopia (blue-blind)

#82C7B1

Achromatopsia (no color)

#BBBBBB

Design tokens & code

CSS

--color: #81cf31;
/* rgb */ color: rgb(129, 207, 49);
/* oklch */ color: oklch(77.5% 0.199 132.8);

Tailwind

colors: {
  custom: {
    50: '#acde75',
    500: '#81cf31',
    950: '#000000',
  },
}

SCSS

$custom: #81cf31;
$custom-light: #acde75;
$custom-dark: #000000;

JSON

{
  "hex": "#81cf31",
  "rgb": {
    "r": 129,
    "g": 207,
    "b": 49
  },
  "hsl": {
    "h": 89.62,
    "s": 62.205,
    "l": 50.196
  },
  "oklch": {
    "l": 0.77502,
    "c": 0.1991,
    "h": 132.8
  },
  "luminance": 0.49515
}

Semantic roles & 50–950 ramp

primary

#81CF31

secondary

#AD8BD1

accent

#43E593

background

#FBFDF7

surface

#F6FBED

border

#D0D4C8

text

#111509

muted

#80837B

Preview Lab

Preview with #81CF31

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

Preview Lab → · Contrast checker → · Palette generator →