#51A228#51A228

#51A228 is a light, vivid yellow-green. Relative luminance 0.277; OKLCH L 63.7% C 0.174 H 137.4°. Best body text is #000000 at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#51A228
RGB	rgb(81, 162, 40)
HSL	hsl(100, 60%, 40%)
HSV	hsv(100, 75%, 64%)
CMYK	cmyk(50%, 0%, 75.3%, 36.5%)
CIE-LAB	lab(59.65, -46.07, 52.35)
CIE-LCH	lch(59.65, 69.74, 131.35°)
OKLab	oklab(63.69% -0.1277 0.1175)
OKLCH	oklch(63.69% 0.174 137.4)
XYZ	xyz(16.6961, 27.7420, 6.4820)
Luminance	0.2774 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A228 #7928A2

analogous

#8EA228 #51A228 #28A23C

triadic

#51A228 #2851A2 #A22851

tetradic

#51A228 #288EA2 #7928A2 #A23C28

square

#51A228 #288EA2 #7928A2 #A23C28

split-complementary

#51A228 #3C28A2 #A2288E

monochromatic

#204010 #38711C #51A228 #6BCE39 #90DA6A

Accessibility & contrast

On white

3.21

#51A228 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.55

#51A228 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51A228

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A228	#FFFFFF	#000000	##000000
##51A228	1.00	3.21	6.55	6.55
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.55	21.00	1.00	1.00
##000000	6.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7940F

Deuteranopia (green-blind)

#9D8D35

Tritanopia (blue-blind)

#4C9C8B

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #51a228;
/* rgb */ color: rgb(81, 162, 40);
/* oklch */ color: oklch(63.7% 0.174 137.4);

Tailwind

colors: {
  custom: {
    50: '#8abe6b',
    500: '#51a228',
    950: '#000000',
  },
}

SCSS

$custom: #51a228;
$custom-light: #8abe6b;
$custom-dark: #000000;

JSON

{
  "hex": "#51a228",
  "rgb": {
    "r": 81,
    "g": 162,
    "b": 40
  },
  "hsl": {
    "h": 99.836,
    "s": 60.396,
    "l": 39.608
  },
  "oklch": {
    "l": 0.63687,
    "c": 0.17354,
    "h": 137.4
  },
  "luminance": 0.27743
}

Semantic roles & 50–950 ramp

primary

#51A228

secondary

#A265C1

accent

#44E4AE

background

#F8FBF6

surface

#F0F7EC

border

#CBD0C7

text

#0C1207

muted

#7D817A

Preview Lab

Preview with #51A228

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

Preview Lab → · Contrast checker → · Palette generator →