#51871B#51871B

#51871B is a mid, vivid yellow-green. Relative luminance 0.192; OKLCH L 56.5% C 0.147 H 133.2°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#51871B
RGB	rgb(81, 135, 27)
HSL	hsl(90, 67%, 32%)
HSV	hsv(90, 80%, 53%)
CMYK	cmyk(40%, 0%, 80%, 47.1%)
CIE-LAB	lab(50.87, -35.63, 48.32)
CIE-LCH	lch(50.87, 60.04, 126.41°)
OKLab	oklab(56.45% -0.1004 0.1071)
OKLCH	oklch(56.45% 0.147 133.2)
XYZ	xyz(12.2550, 19.1558, 4.0884)
Luminance	0.1916 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51871B #511B87

analogous

#87871B #51871B #1B871B

triadic

#51871B #1B5187 #871B51

tetradic

#51871B #1B8787 #511B87 #871B1B

square

#51871B #1B8787 #511B87 #871B1B

split-complementary

#51871B #1B1B87 #871B87

monochromatic

#142107 #325411 #51871B #70BA25 #8ED943

Accessibility & contrast

On white

4.35

#51871B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#51871B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51871B

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51871B	#FFFFFF	#000000	##000000
##51871B	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8D7C00

Deuteranopia (green-blind)

#857827

Tritanopia (blue-blind)

#518173

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #51871b;
/* rgb */ color: rgb(81, 135, 27);
/* oklch */ color: oklch(56.5% 0.147 133.2);

Tailwind

colors: {
  custom: {
    50: '#87aa61',
    500: '#51871b',
    950: '#000000',
  },
}

SCSS

$custom: #51871b;
$custom-light: #87aa61;
$custom-dark: #000000;

JSON

{
  "hex": "#51871b",
  "rgb": {
    "r": 81,
    "g": 135,
    "b": 27
  },
  "hsl": {
    "h": 90,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.56453,
    "c": 0.14681,
    "h": 133.2
  },
  "luminance": 0.19156
}

Semantic roles & 50–950 ramp

primary

#51871B

secondary

#7F44BA

accent

#3EEA94

background

#F8FAF6

surface

#F0F4EB

border

#CBCEC6

text

#0C1005

muted

#7D7F7A

Preview Lab

Preview with #51871B

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

Preview Lab → · Contrast checker → · Palette generator →