#51B227#51B227

#51B227 is a light, vivid green. Relative luminance 0.337; OKLCH L 67.9% C 0.193 H 138.4°. Best body text is #000000 at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#51B227
RGB	rgb(81, 178, 39)
HSL	hsl(102, 64%, 43%)
HSV	hsv(102, 78%, 70%)
CMYK	cmyk(54.5%, 0%, 78.1%, 30.2%)
CIE-LAB	lab(64.75, -52.27, 57.63)
CIE-LCH	lch(64.75, 77.81, 132.21°)
OKLab	oklab(67.88% -0.1444 0.1284)
OKLCH	oklch(67.88% 0.193 138.4)
XYZ	xyz(19.6792, 33.7350, 7.3936)
Luminance	0.3374 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B227 #8827B2

analogous

#96B227 #51B227 #27B243

triadic

#51B227 #2751B2 #B22751

tetradic

#51B227 #2796B2 #8827B2 #B24327

square

#51B227 #2796B2 #8827B2 #B24327

split-complementary

#51B227 #4327B2 #B22796

monochromatic

#234E11 #3A801C #51B227 #6ED541 #94E073

Accessibility & contrast

On white

2.71

#51B227 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.75

#51B227 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B227

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B227	#FFFFFF	#000000	##000000
##51B227	1.00	2.71	7.75	7.75
#FFFFFF	2.71	1.00	21.00	21.00
#000000	7.75	21.00	1.00	1.00
##000000	7.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B8A200

Deuteranopia (green-blind)

#AB9A37

Tritanopia (blue-blind)

#48AC98

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51b227;
/* rgb */ color: rgb(81, 178, 39);
/* oklch */ color: oklch(67.9% 0.193 138.4);

Tailwind

colors: {
  custom: {
    50: '#8cca6c',
    500: '#51b227',
    950: '#000000',
  },
}

SCSS

$custom: #51b227;
$custom-light: #8cca6c;
$custom-dark: #000000;

JSON

{
  "hex": "#51b227",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 39
  },
  "hsl": {
    "h": 101.871,
    "s": 64.055,
    "l": 42.549
  },
  "oklch": {
    "l": 0.67883,
    "c": 0.19327,
    "h": 138.4
  },
  "luminance": 0.33737
}

Semantic roles & 50–950 ramp

primary

#51B227

secondary

#AC6DC8

accent

#41E7B5

background

#F9FCF6

surface

#F1F8EC

border

#CBD1C7

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51B227

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

Preview Lab → · Contrast checker → · Palette generator →