#51A221#51A221

#51A221 is a light, vivid yellow-green. Relative luminance 0.277; OKLCH L 63.6% C 0.177 H 136.8°. Best body text is #000000 at 6.54:1 contrast (WCAG AA passes).

Color values

HEX	#51A221
RGB	rgb(81, 162, 33)
HSL	hsl(98, 66%, 38%)
HSV	hsv(98, 80%, 64%)
CMYK	cmyk(50%, 0%, 79.6%, 36.5%)
CIE-LAB	lab(59.62, -46.51, 54.64)
CIE-LCH	lch(59.62, 71.76, 130.40°)
OKLab	oklab(63.64% -0.1293 0.1213)
OKLCH	oklch(63.64% 0.177 136.8)
XYZ	xyz(16.5877, 27.6986, 5.9108)
Luminance	0.2770 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A221 #7221A2

analogous

#91A221 #51A221 #21A231

triadic

#51A221 #2151A2 #A22151

tetradic

#51A221 #2191A2 #7221A2 #A23121

square

#51A221 #2191A2 #7221A2 #A23121

split-complementary

#51A221 #3121A2 #A22191

monochromatic

#1E3C0C #386F17 #51A221 #6BD42C #8EDE5F

Accessibility & contrast

On white

3.21

#51A221 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.54

#51A221 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51A221

6.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A221	#FFFFFF	#000000	##000000
##51A221	1.00	3.21	6.54	6.54
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.54	21.00	1.00	1.00
##000000	6.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A89400

Deuteranopia (green-blind)

#9D8D30

Tritanopia (blue-blind)

#4C9C8A

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #51a221;
/* rgb */ color: rgb(81, 162, 33);
/* oklch */ color: oklch(63.6% 0.177 136.8);

Tailwind

colors: {
  custom: {
    50: '#8abe67',
    500: '#51a221',
    950: '#000000',
  },
}

SCSS

$custom: #51a221;
$custom-light: #8abe67;
$custom-dark: #000000;

JSON

{
  "hex": "#51a221",
  "rgb": {
    "r": 81,
    "g": 162,
    "b": 33
  },
  "hsl": {
    "h": 97.674,
    "s": 66.154,
    "l": 38.235
  },
  "oklch": {
    "l": 0.63642,
    "c": 0.17728,
    "h": 136.8
  },
  "luminance": 0.277
}

Semantic roles & 50–950 ramp

primary

#51A221

secondary

#9D5CC3

accent

#3FE9AA

background

#F8FBF6

surface

#F0F7EB

border

#CBD0C6

text

#0D1207

muted

#7D817A

Preview Lab

Preview with #51A221

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

Preview Lab → · Contrast checker → · Palette generator →