#51B571#51B571

#51B571 is a light, vivid green. Relative luminance 0.360; OKLCH L 69.6% C 0.137 H 151.7°. Best body text is #000000 at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#51B571
RGB	rgb(81, 181, 113)
HSL	hsl(139, 40%, 51%)
HSV	hsv(139, 55%, 71%)
CMYK	cmyk(55.2%, 0%, 37.6%, 29%)
CIE-LAB	lab(66.51, -44.54, 26.05)
CIE-LCH	lch(66.51, 51.60, 149.68°)
OKLab	oklab(69.59% -0.1208 0.0651)
OKLCH	oklch(69.59% 0.137 151.7)
XYZ	xyz(22.8962, 35.9873, 21.3593)
Luminance	0.3599 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B571 #B55195

analogous

#63B551 #51B571 #51B5A3

triadic

#51B571 #7151B5 #B57151

tetradic

#51B571 #5163B5 #B55195 #B5A351

square

#51B571 #5163B5 #B55195 #B5A351

split-complementary

#51B571 #A351B5 #B55163

monochromatic

#2A623C #3C8D56 #51B571 #7CC794 #A7DAB7

Accessibility & contrast

On white

2.56

#51B571 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.20

#51B571 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B571

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B571	#FFFFFF	#000000	##000000
##51B571	1.00	2.56	8.20	8.20
#FFFFFF	2.56	1.00	21.00	21.00
#000000	8.20	21.00	1.00	1.00
##000000	8.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B6A86C

Deuteranopia (green-blind)

#A89E75

Tritanopia (blue-blind)

#37B3A4

Achromatopsia (no color)

#A2A2A2

Design tokens & code

CSS

--color: #51b571;
/* rgb */ color: rgb(81, 181, 113);
/* oklch */ color: oklch(69.6% 0.137 151.7);

Tailwind

colors: {
  custom: {
    50: '#8acc9a',
    500: '#51b571',
    950: '#000000',
  },
}

SCSS

$custom: #51b571;
$custom-light: #8acc9a;
$custom-dark: #000000;

JSON

{
  "hex": "#51b571",
  "rgb": {
    "r": 81,
    "g": 181,
    "b": 113
  },
  "hsl": {
    "h": 139.2,
    "s": 40.323,
    "l": 51.373
  },
  "oklch": {
    "l": 0.69593,
    "c": 0.13722,
    "h": 151.7
  },
  "luminance": 0.35989
}

Semantic roles & 50–950 ramp

primary

#51B571

secondary

#C79BB9

accent

#58AAD0

background

#F8FCF9

surface

#F0F9F2

border

#CBD2CC

text

#0C130E

muted

#7D827E

Preview Lab

Preview with #51B571

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

Preview Lab → · Contrast checker → · Palette generator →