#51D128#51D128

#51D128 is a light, highly saturated green. Relative luminance 0.475; OKLCH L 75.9% C 0.228 H 139.7°. Best body text is #000000 at 10.50:1 contrast (WCAG AA passes).

Color values

HEX	#51D128
RGB	rgb(81, 209, 40)
HSL	hsl(105, 68%, 49%)
HSV	hsv(105, 81%, 82%)
CMYK	cmyk(61.2%, 0%, 80.9%, 18%)
CIE-LAB	lab(74.51, -63.17, 66.50)
CIE-LCH	lch(74.51, 91.72, 133.53°)
OKLab	oklab(75.95% -0.1737 0.1471)
OKLCH	oklch(75.95% 0.228 139.7)
XYZ	xyz(26.5756, 47.5010, 9.7752)
Luminance	0.4750 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D128 #A828D1

analogous

#A6D128 #51D128 #28D154

triadic

#51D128 #2851D1 #D12851

tetradic

#51D128 #28A6D1 #A828D1 #D15428

square

#51D128 #28A6D1 #A828D1 #D15428

split-complementary

#51D128 #5428D1 #D128A6

monochromatic

#296A14 #3D9E1E #51D128 #78DF57 #A1E98B

Accessibility & contrast

On white

2.00

#51D128 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.50

#51D128 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D128

10.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D128	#FFFFFF	#000000	##000000
##51D128	1.00	2.00	10.50	10.50
#FFFFFF	2.00	1.00	21.00	21.00
#000000	10.50	21.00	1.00	1.00
##000000	10.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D7BE00

Deuteranopia (green-blind)

#C7B33D

Tritanopia (blue-blind)

#40CAB2

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #51d128;
/* rgb */ color: rgb(81, 209, 40);
/* oklch */ color: oklch(75.9% 0.228 139.7);

Tailwind

colors: {
  custom: {
    50: '#91e071',
    500: '#51d128',
    950: '#000000',
  },
}

SCSS

$custom: #51d128;
$custom-light: #91e071;
$custom-dark: #000000;

JSON

{
  "hex": "#51d128",
  "rgb": {
    "r": 81,
    "g": 209,
    "b": 40
  },
  "hsl": {
    "h": 105.444,
    "s": 67.871,
    "l": 48.824
  },
  "oklch": {
    "l": 0.75948,
    "c": 0.22759,
    "h": 139.7
  },
  "luminance": 0.47503
}

Semantic roles & 50–950 ramp

primary

#51D128

secondary

#BF82D3

accent

#3DEBC1

background

#F9FDF7

surface

#F2FBED

border

#CCD4C8

text

#0E1509

muted

#7E837B

Preview Lab

Preview with #51D128

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

Preview Lab → · Contrast checker → · Palette generator →