#51B31C#51B31C

#51B31C 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 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#51B31C
RGB	rgb(81, 179, 28)
HSL	hsl(99, 73%, 41%)
HSV	hsv(99, 84%, 70%)
CMYK	cmyk(54.7%, 0%, 84.4%, 29.8%)
CIE-LAB	lab(65.02, -53.21, 60.98)
CIE-LCH	lch(65.02, 80.93, 131.11°)
OKLab	oklab(68.09% -0.1475 0.1339)
OKLCH	oklch(68.09% 0.199 137.8)
XYZ	xyz(19.7224, 34.0718, 6.6356)
Luminance	0.3407 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B31C #7E1CB3

analogous

#9DB31C #51B31C #1CB332

triadic

#51B31C #1C51B3 #B31C51

tetradic

#51B31C #1C9DB3 #7E1CB3 #B3321C

square

#51B31C #1C9DB3 #7E1CB3 #B3321C

split-complementary

#51B31C #321CB3 #B31C9D

monochromatic

#21490B #397E14 #51B31C #6CDE2E #91E763

Accessibility & contrast

On white

2.69

#51B31C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.81

#51B31C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B31C

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B31C	#FFFFFF	#000000	##000000
##51B31C	1.00	2.69	7.81	7.81
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.81	21.00	1.00	1.00
##000000	7.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9A300

Deuteranopia (green-blind)

#AD9B30

Tritanopia (blue-blind)

#49AC98

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51b31c;
/* rgb */ color: rgb(81, 179, 28);
/* oklch */ color: oklch(68.1% 0.199 137.8);

Tailwind

colors: {
  custom: {
    50: '#8dca68',
    500: '#51b31c',
    950: '#000000',
  },
}

SCSS

$custom: #51b31c;
$custom-light: #8dca68;
$custom-dark: #000000;

JSON

{
  "hex": "#51b31c",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 28
  },
  "hsl": {
    "h": 98.94,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.68089,
    "c": 0.19921,
    "h": 137.8
  },
  "luminance": 0.34073
}

Semantic roles & 50–950 ramp

primary

#51B31C

secondary

#A55FCB

accent

#38F0AF

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51B31C

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

Preview Lab → · Contrast checker → · Palette generator →