#51E666#51E666

#51E666 is a light, highly saturated green. Relative luminance 0.593; OKLCH L 81.8% C 0.212 H 145.7°. Best body text is #000000 at 12.86:1 contrast (WCAG AA passes).

Color values

HEX	#51E666
RGB	rgb(81, 230, 102)
HSL	hsl(128, 75%, 61%)
HSV	hsv(128, 65%, 90%)
CMYK	cmyk(64.8%, 0%, 55.7%, 9.8%)
CIE-LAB	lab(81.46, -64.83, 50.28)
CIE-LCH	lch(81.46, 82.05, 142.20°)
OKLab	oklab(81.84% -0.1752 0.1196)
OKLCH	oklch(81.84% 0.212 145.7)
XYZ	xyz(34.0862, 59.2988, 22.2173)
Luminance	0.5930 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51E666 #E651D1

analogous

#86E651 #51E666 #51E6B0

triadic

#51E666 #6651E6 #E66651

tetradic

#51E666 #5186E6 #E651D1 #E6B051

square

#51E666 #5186E6 #E651D1 #E6B051

split-complementary

#51E666 #B051E6 #E65186

monochromatic

#18A52C #1FDA3A #51E666 #87EE95 #BCF5C4

Accessibility & contrast

On white

1.63

#51E666 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.86

#51E666 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51E666

12.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51E666	#FFFFFF	#000000	##000000
##51E666	1.00	1.63	12.86	12.86
#FFFFFF	1.63	1.00	21.00	21.00
#000000	12.86	21.00	1.00	1.00
##000000	12.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#E9D25A

Deuteranopia (green-blind)

#D7C570

Tritanopia (blue-blind)

#25E1CA

Achromatopsia (no color)

#CACACA

Design tokens & code

CSS

--color: #51e666;
/* rgb */ color: rgb(81, 230, 102);
/* oklch */ color: oklch(81.8% 0.212 145.7);

Tailwind

colors: {
  custom: {
    50: '#92ef95',
    500: '#51e666',
    950: '#000000',
  },
}

SCSS

$custom: #51e666;
$custom-light: #92ef95;
$custom-dark: #000000;

JSON

{
  "hex": "#51e666",
  "rgb": {
    "r": 81,
    "g": 230,
    "b": 102
  },
  "hsl": {
    "h": 128.456,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.81844,
    "c": 0.21217,
    "h": 145.7
  },
  "luminance": 0.59302
}

Semantic roles & 50–950 ramp

primary

#51E666

secondary

#A73497

accent

#0EBBD7

background

#FCFFFC

surface

#F5FEF4

border

#CFD6CE

text

#0E170D

muted

#7F857F

Preview Lab

Preview with #51E666

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

Preview Lab → · Contrast checker → · Palette generator →