#51851B#51851B

#51851B is a mid, vivid yellow-green. Relative luminance 0.186; OKLCH L 55.9% C 0.144 H 132.8°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#51851B
RGB	rgb(81, 133, 27)
HSL	hsl(89, 66%, 31%)
HSV	hsv(89, 80%, 52%)
CMYK	cmyk(39.1%, 0%, 79.7%, 47.8%)
CIE-LAB	lab(50.22, -34.75, 47.71)
CIE-LCH	lch(50.22, 59.02, 126.07°)
OKLab	oklab(55.92% -0.098 0.1058)
OKLCH	oklch(55.92% 0.144 132.8)
XYZ	xyz(11.9785, 18.6030, 3.9963)
Luminance	0.1860 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51851B #4F1B85

analogous

#85841B #51851B #1C851B

triadic

#51851B #1B5185 #851B51

tetradic

#51851B #1B8584 #4F1B85 #851B1C

square

#51851B #1B8584 #4F1B85 #851B1C

split-complementary

#51851B #1B1C85 #841B85

monochromatic

#131F06 #325211 #51851B #70B825 #8FD942

Accessibility & contrast

On white

4.45

#51851B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#51851B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51851B

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51851B	#FFFFFF	#000000	##000000
##51851B	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B7A00

Deuteranopia (green-blind)

#847626

Tritanopia (blue-blind)

#527F71

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #51851b;
/* rgb */ color: rgb(81, 133, 27);
/* oklch */ color: oklch(55.9% 0.144 132.8);

Tailwind

colors: {
  custom: {
    50: '#87a961',
    500: '#51851b',
    950: '#000000',
  },
}

SCSS

$custom: #51851b;
$custom-light: #87a961;
$custom-dark: #000000;

JSON

{
  "hex": "#51851b",
  "rgb": {
    "r": 81,
    "g": 133,
    "b": 27
  },
  "hsl": {
    "h": 89.434,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.55922,
    "c": 0.14424,
    "h": 132.8
  },
  "luminance": 0.18604
}

Semantic roles & 50–950 ramp

primary

#51851B

secondary

#7D44B8

accent

#3FE992

background

#F8FAF6

surface

#F0F4EB

border

#CBCEC6

text

#0C1005

muted

#7D7F7A

Preview Lab

Preview with #51851B

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

Preview Lab → · Contrast checker → · Palette generator →