#509D21#509D21

#509D21 is a light, vivid yellow-green. Relative luminance 0.259; OKLCH L 62.3% C 0.172 H 136.6°. Best body text is #000000 at 6.19:1 contrast (WCAG AA passes).

Color values

HEX	#509D21
RGB	rgb(80, 157, 33)
HSL	hsl(97, 65%, 37%)
HSV	hsv(97, 79%, 62%)
CMYK	cmyk(49%, 0%, 79%, 38.4%)
CIE-LAB	lab(57.97, -44.84, 53.07)
CIE-LCH	lch(57.97, 69.48, 130.20°)
OKLab	oklab(62.28% -0.1248 0.118)
OKLCH	oklch(62.28% 0.172 136.6)
XYZ	xyz(15.6393, 25.9282, 5.6191)
Luminance	0.2593 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#509D21 #6E219D

analogous

#8E9D21 #509D21 #219D30

triadic

#509D21 #21509D #9D2150

tetradic

#509D21 #218E9D #6E219D #9D3021

square

#509D21 #218E9D #6E219D #9D3021

split-complementary

#509D21 #30219D #9D218E

monochromatic

#1C380C #366A16 #509D21 #6AD02C #8DDD5C

Accessibility & contrast

On white

3.39

#509D21 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.19

#509D21 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #509D21

6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##509D21	#FFFFFF	#000000	##000000
##509D21	1.00	3.39	6.19	6.19
#FFFFFF	3.39	1.00	21.00	21.00
#000000	6.19	21.00	1.00	1.00
##000000	6.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A38F00

Deuteranopia (green-blind)

#98892F

Tritanopia (blue-blind)

#4C9786

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #509d21;
/* rgb */ color: rgb(80, 157, 33);
/* oklch */ color: oklch(62.3% 0.172 136.6);

Tailwind

colors: {
  custom: {
    50: '#89ba67',
    500: '#509d21',
    950: '#000000',
  },
}

SCSS

$custom: #509d21;
$custom-light: #89ba67;
$custom-dark: #000000;

JSON

{
  "hex": "#509d21",
  "rgb": {
    "r": 80,
    "g": 157,
    "b": 33
  },
  "hsl": {
    "h": 97.258,
    "s": 65.263,
    "l": 37.255
  },
  "oklch": {
    "l": 0.62276,
    "c": 0.17172,
    "h": 136.6
  },
  "luminance": 0.25929
}

Semantic roles & 50–950 ramp

primary

#509D21

secondary

#9A59C1

accent

#40E8A8

background

#F8FBF6

surface

#F0F6EB

border

#CBD0C6

text

#0C1206

muted

#7D817A

Preview Lab

Preview with #509D21

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

Preview Lab → · Contrast checker → · Palette generator →