#51B31D#51B31D

#51B31D is a light, vivid yellow-green. Relative luminance 0.341; OKLCH L 68.1% C 0.199 H 137.8°. Best body text is #000000 at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#51B31D
RGB	rgb(81, 179, 29)
HSL	hsl(99, 72%, 41%)
HSV	hsv(99, 84%, 70%)
CMYK	cmyk(54.7%, 0%, 83.8%, 29.8%)
CIE-LAB	lab(65.02, -53.17, 60.74)
CIE-LCH	lch(65.02, 80.72, 131.20°)
OKLab	oklab(68.09% -0.1474 0.1335)
OKLCH	oklch(68.09% 0.199 137.8)
XYZ	xyz(19.7345, 34.0767, 6.6997)
Luminance	0.3408 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B31D #7F1DB3

analogous

#9CB31D #51B31D #1DB334

triadic

#51B31D #1D51B3 #B31D51

tetradic

#51B31D #1D9CB3 #7F1DB3 #B3341D

square

#51B31D #1D9CB3 #7F1DB3 #B3341D

split-complementary

#51B31D #341DB3 #B31D9C

monochromatic

#214A0C #397E14 #51B31D #6CDD30 #91E664

Accessibility & contrast

On white

2.69

#51B31D on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.82

#51B31D on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B31D

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B31D	#FFFFFF	#000000	##000000
##51B31D	1.00	2.69	7.82	7.82
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.82	21.00	1.00	1.00
##000000	7.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9A300

Deuteranopia (green-blind)

#AD9B31

Tritanopia (blue-blind)

#49AC98

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51b31d;
/* rgb */ color: rgb(81, 179, 29);
/* oklch */ color: oklch(68.1% 0.199 137.8);

Tailwind

colors: {
  custom: {
    50: '#8dca68',
    500: '#51b31d',
    950: '#000000',
  },
}

SCSS

$custom: #51b31d;
$custom-light: #8dca68;
$custom-dark: #000000;

JSON

{
  "hex": "#51b31d",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 29
  },
  "hsl": {
    "h": 99.2,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.68093,
    "c": 0.19883,
    "h": 137.8
  },
  "luminance": 0.34078
}

Semantic roles & 50–950 ramp

primary

#51B31D

secondary

#A661CB

accent

#39EFB0

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51B31D

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

Preview Lab → · Contrast checker → · Palette generator →