#51901B#51901B

#51901B is a mid, vivid yellow-green. Relative luminance 0.218; OKLCH L 58.8% C 0.158 H 134.5°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#51901B
RGB	rgb(81, 144, 27)
HSL	hsl(92, 68%, 34%)
HSV	hsv(92, 81%, 56%)
CMYK	cmyk(43.8%, 0%, 81.3%, 43.5%)
CIE-LAB	lab(53.79, -39.51, 51.05)
CIE-LCH	lch(53.79, 64.55, 127.74°)
OKLab	oklab(58.84% -0.1109 0.1128)
OKLCH	oklch(58.84% 0.158 134.5)
XYZ	xyz(13.5642, 21.7742, 4.5248)
Luminance	0.2177 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51901B #5A1B90

analogous

#8B901B #51901B #1B9020

triadic

#51901B #1B5190 #901B51

tetradic

#51901B #1B8B90 #5A1B90 #90201B

square

#51901B #1B8B90 #5A1B90 #90201B

split-complementary

#51901B #201B90 #901B8B

monochromatic

#172908 #345C11 #51901B #6EC425 #8DDD49

Accessibility & contrast

On white

3.92

#51901B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#51901B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51901B

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51901B	#FFFFFF	#000000	##000000
##51901B	1.00	3.92	5.36	5.36
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.36	21.00	1.00	1.00
##000000	5.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#968400

Deuteranopia (green-blind)

#8D7F28

Tritanopia (blue-blind)

#508A7B

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #51901b;
/* rgb */ color: rgb(81, 144, 27);
/* oklch */ color: oklch(58.8% 0.158 134.5);

Tailwind

colors: {
  custom: {
    50: '#88b162',
    500: '#51901b',
    950: '#000000',
  },
}

SCSS

$custom: #51901b;
$custom-light: #88b162;
$custom-dark: #000000;

JSON

{
  "hex": "#51901b",
  "rgb": {
    "r": 81,
    "g": 144,
    "b": 27
  },
  "hsl": {
    "h": 92.308,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.58843,
    "c": 0.15818,
    "h": 134.5
  },
  "luminance": 0.21775
}

Semantic roles & 50–950 ramp

primary

#51901B

secondary

#8848BF

accent

#3DEB9B

background

#F8FAF6

surface

#F0F5EB

border

#CBCFC6

text

#0C1106

muted

#7D807A

Preview Lab

Preview with #51901B

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

Preview Lab → · Contrast checker → · Palette generator →