#51A421#51A421

#51A421 is a light, vivid yellow-green. Relative luminance 0.284; OKLCH L 64.2% C 0.180 H 137.0°. Best body text is #000000 at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#51A421
RGB	rgb(81, 164, 33)
HSL	hsl(98, 66%, 39%)
HSV	hsv(98, 80%, 64%)
CMYK	cmyk(50.6%, 0%, 79.9%, 35.7%)
CIE-LAB	lab(60.26, -47.29, 55.25)
CIE-LCH	lch(60.26, 72.72, 130.57°)
OKLab	oklab(64.17% -0.1314 0.1225)
OKLCH	oklch(64.17% 0.18 137)
XYZ	xyz(16.9428, 28.4088, 6.0292)
Luminance	0.2841 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A421 #7421A4

analogous

#92A421 #51A421 #21A432

triadic

#51A421 #2151A4 #A42151

tetradic

#51A421 #2192A4 #7421A4 #A43221

square

#51A421 #2192A4 #7421A4 #A43221

split-complementary

#51A421 #3221A4 #A42192

monochromatic

#1F3E0C #387117 #51A421 #6BD52D #8FDF60

Accessibility & contrast

On white

3.14

#51A421 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.68

#51A421 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51A421

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A421	#FFFFFF	#000000	##000000
##51A421	1.00	3.14	6.68	6.68
#FFFFFF	3.14	1.00	21.00	21.00
#000000	6.68	21.00	1.00	1.00
##000000	6.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AA9600

Deuteranopia (green-blind)

#9F8F30

Tritanopia (blue-blind)

#4C9E8C

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #51a421;
/* rgb */ color: rgb(81, 164, 33);
/* oklch */ color: oklch(64.2% 0.180 137.0);

Tailwind

colors: {
  custom: {
    50: '#8ac068',
    500: '#51a421',
    950: '#000000',
  },
}

SCSS

$custom: #51a421;
$custom-light: #8ac068;
$custom-dark: #000000;

JSON

{
  "hex": "#51a421",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 33
  },
  "hsl": {
    "h": 98.015,
    "s": 66.497,
    "l": 38.627
  },
  "oklch": {
    "l": 0.64169,
    "c": 0.17968,
    "h": 137
  },
  "luminance": 0.2841
}

Semantic roles & 50–950 ramp

primary

#51A421

secondary

#9E5DC4

accent

#3EE9AB

background

#F8FBF6

surface

#F0F7EB

border

#CBD0C6

text

#0D1207

muted

#7D817A

Preview Lab

Preview with #51A421

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

Preview Lab → · Contrast checker → · Palette generator →