#51881B#51881B

#51881B is a mid, vivid yellow-green. Relative luminance 0.194; OKLCH L 56.7% C 0.148 H 133.3°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#51881B
RGB	rgb(81, 136, 27)
HSL	hsl(90, 67%, 32%)
HSV	hsv(90, 80%, 53%)
CMYK	cmyk(40.4%, 0%, 80.1%, 46.7%)
CIE-LAB	lab(51.19, -36.07, 48.63)
CIE-LCH	lch(51.19, 60.54, 126.57°)
OKLab	oklab(56.72% -0.1016 0.1077)
OKLCH	oklch(56.72% 0.148 133.3)
XYZ	xyz(12.3951, 19.4362, 4.1351)
Luminance	0.1944 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51881B #521B88

analogous

#88881B #51881B #1B881B

triadic

#51881B #1B5188 #881B51

tetradic

#51881B #1B8888 #521B88 #881B1B

square

#51881B #1B8888 #521B88 #881B1B

split-complementary

#51881B #1B1B88 #881B88

monochromatic

#142207 #335511 #51881B #6FBB25 #8EDA44

Accessibility & contrast

On white

4.30

#51881B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#51881B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51881B

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51881B	#FFFFFF	#000000	##000000
##51881B	1.00	4.30	4.89	4.89
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8E7D00

Deuteranopia (green-blind)

#867827

Tritanopia (blue-blind)

#518274

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #51881b;
/* rgb */ color: rgb(81, 136, 27);
/* oklch */ color: oklch(56.7% 0.148 133.3);

Tailwind

colors: {
  custom: {
    50: '#87ab61',
    500: '#51881b',
    950: '#000000',
  },
}

SCSS

$custom: #51881b;
$custom-light: #87ab61;
$custom-dark: #000000;

JSON

{
  "hex": "#51881b",
  "rgb": {
    "r": 81,
    "g": 136,
    "b": 27
  },
  "hsl": {
    "h": 90.275,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.56719,
    "c": 0.14809,
    "h": 133.3
  },
  "luminance": 0.19437
}

Semantic roles & 50–950 ramp

primary

#51881B

secondary

#8044BB

accent

#3EEA95

background

#F8FAF6

surface

#F0F4EB

border

#CBCEC6

text

#0C1005

muted

#7D7F7A

Preview Lab

Preview with #51881B

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

Preview Lab → · Contrast checker → · Palette generator →