#51BB31#51BB31

#51BB31 is a light, vivid green. Relative luminance 0.375; OKLCH L 70.3% C 0.198 H 139.6°. Best body text is #000000 at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#51BB31
RGB	rgb(81, 187, 49)
HSL	hsl(106, 58%, 46%)
HSV	hsv(106, 74%, 73%)
CMYK	cmyk(56.7%, 0%, 73.8%, 26.7%)
CIE-LAB	lab(67.66, -54.92, 57.11)
CIE-LCH	lch(67.66, 79.24, 133.88°)
OKLab	oklab(70.3% -0.151 0.1287)
OKLCH	oklch(70.3% 0.198 139.6)
XYZ	xyz(21.7171, 37.5099, 9.0008)
Luminance	0.3751 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BB31 #9B31BB

analogous

#96BB31 #51BB31 #31BB56

triadic

#51BB31 #3151BB #BB3151

tetradic

#51BB31 #3196BB #9B31BB #BB5631

square

#51BB31 #3196BB #9B31BB #BB5631

split-complementary

#51BB31 #5631BB #BB3196

monochromatic

#275A18 #3C8B24 #51BB31 #73D356 #9BE087

Accessibility & contrast

On white

2.47

#51BB31 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.50

#51BB31 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BB31

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BB31	#FFFFFF	#000000	##000000
##51BB31	1.00	2.47	8.50	8.50
#FFFFFF	2.47	1.00	21.00	21.00
#000000	8.50	21.00	1.00	1.00
##000000	8.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C0AA16

Deuteranopia (green-blind)

#B3A13F

Tritanopia (blue-blind)

#45B5A0

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #51bb31;
/* rgb */ color: rgb(81, 187, 49);
/* oklch */ color: oklch(70.3% 0.198 139.6);

Tailwind

colors: {
  custom: {
    50: '#8dd072',
    500: '#51bb31',
    950: '#000000',
  },
}

SCSS

$custom: #51bb31;
$custom-light: #8dd072;
$custom-dark: #000000;

JSON

{
  "hex": "#51bb31",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 49
  },
  "hsl": {
    "h": 106.087,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.703,
    "c": 0.19842,
    "h": 139.6
  },
  "luminance": 0.37512
}

Semantic roles & 50–950 ramp

primary

#51BB31

secondary

#B87FC9

accent

#46E2BE

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0D1408

muted

#7E827B

Preview Lab

Preview with #51BB31

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

Preview Lab → · Contrast checker → · Palette generator →