#51B728#51B728

#51B728 is a light, vivid green. Relative luminance 0.358; OKLCH L 69.2% C 0.199 H 138.7°. Best body text is #000000 at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#51B728
RGB	rgb(81, 183, 40)
HSL	hsl(103, 64%, 44%)
HSV	hsv(103, 78%, 72%)
CMYK	cmyk(55.7%, 0%, 78.1%, 28.2%)
CIE-LAB	lab(66.34, -54.05, 58.84)
CIE-LCH	lch(66.34, 79.90, 132.57°)
OKLab	oklab(69.2% -0.1492 0.1311)
OKLCH	oklch(69.2% 0.199 138.7)
XYZ	xyz(20.7090, 35.7678, 7.8197)
Luminance	0.3577 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B728 #8E28B7

analogous

#98B728 #51B728 #28B746

triadic

#51B728 #2851B7 #B72851

tetradic

#51B728 #2898B7 #8E28B7 #B74628

square

#51B728 #2898B7 #8E28B7 #B74628

split-complementary

#51B728 #4628B7 #B72898

monochromatic

#255312 #3B851D #51B728 #6FD646 #96E178

Accessibility & contrast

On white

2.58

#51B728 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.15

#51B728 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B728

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B728	#FFFFFF	#000000	##000000
##51B728	1.00	2.58	8.15	8.15
#FFFFFF	2.58	1.00	21.00	21.00
#000000	8.15	21.00	1.00	1.00
##000000	8.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BDA600

Deuteranopia (green-blind)

#B09E38

Tritanopia (blue-blind)

#47B19C

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #51b728;
/* rgb */ color: rgb(81, 183, 40);
/* oklch */ color: oklch(69.2% 0.199 138.7);

Tailwind

colors: {
  custom: {
    50: '#8dcd6d',
    500: '#51b728',
    950: '#000000',
  },
}

SCSS

$custom: #51b728;
$custom-light: #8dcd6d;
$custom-dark: #000000;

JSON

{
  "hex": "#51b728",
  "rgb": {
    "r": 81,
    "g": 183,
    "b": 40
  },
  "hsl": {
    "h": 102.797,
    "s": 64.126,
    "l": 43.725
  },
  "oklch": {
    "l": 0.69197,
    "c": 0.19858,
    "h": 138.7
  },
  "luminance": 0.3577
}

Semantic roles & 50–950 ramp

primary

#51B728

secondary

#B072C9

accent

#41E7B7

background

#F9FCF6

surface

#F1F9EC

border

#CBD2C7

text

#0D1408

muted

#7E827B

Preview Lab

Preview with #51B728

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

Preview Lab → · Contrast checker → · Palette generator →