#51CA21#51CA21

#51CA21 is a light, highly saturated green. Relative luminance 0.441; OKLCH L 74.1% C 0.223 H 139.2°. Best body text is #000000 at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#51CA21
RGB	rgb(81, 202, 33)
HSL	hsl(103, 72%, 46%)
HSV	hsv(103, 84%, 79%)
CMYK	cmyk(59.9%, 0%, 83.7%, 20.8%)
CIE-LAB	lab(72.29, -61.13, 66.27)
CIE-LCH	lch(72.29, 90.16, 132.69°)
OKLab	oklab(74.11% -0.1685 0.1457)
OKLCH	oklch(74.11% 0.223 139.2)
XYZ	xyz(24.7873, 44.0979, 8.6441)
Luminance	0.4410 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51CA21 #9A21CA

analogous

#A5CA21 #51CA21 #21CA46

triadic

#51CA21 #2151CA #CA2151

tetradic

#51CA21 #21A5CA #9A21CA #CA4621

square

#51CA21 #21A5CA #9A21CA #CA4621

split-complementary

#51CA21 #4621CA #CA21A5

monochromatic

#276110 #3C9518 #51CA21 #73E147 #9BEA7C

Accessibility & contrast

On white

2.14

#51CA21 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.82

#51CA21 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51CA21

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51CA21	#FFFFFF	#000000	##000000
##51CA21	1.00	2.14	9.82	9.82
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.82	21.00	1.00	1.00
##000000	9.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D0B700

Deuteranopia (green-blind)

#C1AE38

Tritanopia (blue-blind)

#42C3AC

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51ca21;
/* rgb */ color: rgb(81, 202, 33);
/* oklch */ color: oklch(74.1% 0.223 139.2);

Tailwind

colors: {
  custom: {
    50: '#90db6d',
    500: '#51ca21',
    950: '#000000',
  },
}

SCSS

$custom: #51ca21;
$custom-light: #90db6d;
$custom-dark: #000000;

JSON

{
  "hex": "#51ca21",
  "rgb": {
    "r": 81,
    "g": 202,
    "b": 33
  },
  "hsl": {
    "h": 102.959,
    "s": 71.915,
    "l": 46.078
  },
  "oklch": {
    "l": 0.74106,
    "c": 0.22275,
    "h": 139.2
  },
  "luminance": 0.441
}

Semantic roles & 50–950 ramp

primary

#51CA21

secondary

#B775D2

accent

#39EFBB

background

#F9FDF7

surface

#F2FBED

border

#CCD4C8

text

#0E1508

muted

#7E837B

Preview Lab

Preview with #51CA21

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

Preview Lab → · Contrast checker → · Palette generator →