#51831B#51831B

#51831B is a mid, vivid yellow-green. Relative luminance 0.181; OKLCH L 55.4% C 0.142 H 132.5°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#51831B
RGB	rgb(81, 131, 27)
HSL	hsl(89, 66%, 31%)
HSV	hsv(89, 79%, 51%)
CMYK	cmyk(38.2%, 0%, 79.4%, 48.6%)
CIE-LAB	lab(49.57, -33.85, 47.09)
CIE-LCH	lch(49.57, 57.99, 125.71°)
OKLab	oklab(55.39% -0.0956 0.1045)
OKLCH	oklch(55.39% 0.142 132.5)
XYZ	xyz(11.7073, 18.0605, 3.9059)
Luminance	0.1806 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51831B #4D1B83

analogous

#83811B #51831B #1D831B

triadic

#51831B #1B5183 #831B51

tetradic

#51831B #1B8381 #4D1B83 #831B1D

square

#51831B #1B8381 #4D1B83 #831B1D

split-complementary

#51831B #1B1D83 #811B83

monochromatic

#121E06 #325011 #51831B #70B625 #8FD841

Accessibility & contrast

On white

4.55

#51831B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#51831B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51831B

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51831B	#FFFFFF	#000000	##000000
##51831B	1.00	4.55	4.61	4.61
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#897801

Deuteranopia (green-blind)

#827426

Tritanopia (blue-blind)

#527D70

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #51831b;
/* rgb */ color: rgb(81, 131, 27);
/* oklch */ color: oklch(55.4% 0.142 132.5);

Tailwind

colors: {
  custom: {
    50: '#87a760',
    500: '#51831b',
    950: '#000000',
  },
}

SCSS

$custom: #51831b;
$custom-light: #87a760;
$custom-dark: #000000;

JSON

{
  "hex": "#51831b",
  "rgb": {
    "r": 81,
    "g": 131,
    "b": 27
  },
  "hsl": {
    "h": 88.846,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.5539,
    "c": 0.14165,
    "h": 132.5
  },
  "luminance": 0.18061
}

Semantic roles & 50–950 ramp

primary

#51831B

secondary

#7B43B6

accent

#3FE991

background

#F8FAF5

surface

#F0F4EA

border

#CBCEC6

text

#0C0F05

muted

#7D7F79

Preview Lab

Preview with #51831B

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

Preview Lab → · Contrast checker → · Palette generator →