#51B231#51B231

#51B231 is a light, vivid green. Relative luminance 0.338; OKLCH L 68.0% C 0.188 H 139.2°. Best body text is #000000 at 7.76:1 contrast (WCAG AA passes).

Color values

HEX	#51B231
RGB	rgb(81, 178, 49)
HSL	hsl(105, 57%, 45%)
HSV	hsv(105, 72%, 70%)
CMYK	cmyk(54.5%, 0%, 72.5%, 30.2%)
CIE-LAB	lab(64.81, -51.59, 54.24)
CIE-LCH	lch(64.81, 74.86, 133.56°)
OKLab	oklab(67.95% -0.142 0.1227)
OKLCH	oklch(67.95% 0.188 139.2)
XYZ	xyz(19.8673, 33.8103, 8.3842)
Luminance	0.3381 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B231 #9231B2

analogous

#92B231 #51B231 #31B251

triadic

#51B231 #3151B2 #B23151

tetradic

#51B231 #3192B2 #9231B2 #B25131

square

#51B231 #3192B2 #9231B2 #B25131

split-complementary

#51B231 #5131B2 #B23192

monochromatic

#255217 #3B8224 #51B231 #70CF51 #98DC81

Accessibility & contrast

On white

2.71

#51B231 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.76

#51B231 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B231

7.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B231	#FFFFFF	#000000	##000000
##51B231	1.00	2.71	7.76	7.76
#FFFFFF	2.71	1.00	21.00	21.00
#000000	7.76	21.00	1.00	1.00
##000000	7.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B7A21A

Deuteranopia (green-blind)

#AB9A3E

Tritanopia (blue-blind)

#47AC99

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51b231;
/* rgb */ color: rgb(81, 178, 49);
/* oklch */ color: oklch(68.0% 0.188 139.2);

Tailwind

colors: {
  custom: {
    50: '#8cca71',
    500: '#51b231',
    950: '#000000',
  },
}

SCSS

$custom: #51b231;
$custom-light: #8cca71;
$custom-dark: #000000;

JSON

{
  "hex": "#51b231",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 49
  },
  "hsl": {
    "h": 105.116,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.67952,
    "c": 0.1877,
    "h": 139.2
  },
  "luminance": 0.33812
}

Semantic roles & 50–950 ramp

primary

#51B231

secondary

#B379C5

accent

#48E0BA

background

#F9FCF7

surface

#F1F8ED

border

#CBD1C8

text

#0D1308

muted

#7E827B

Preview Lab

Preview with #51B231

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

Preview Lab → · Contrast checker → · Palette generator →