#638D17#638D17

#638D17 is a mid, vivid yellow-green. Relative luminance 0.218; OKLCH L 59.1% C 0.147 H 128.4°. Best body text is #000000 at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#638D17
RGB	rgb(99, 141, 23)
HSL	hsl(81, 72%, 32%)
HSV	hsv(81, 84%, 55%)
CMYK	cmyk(29.8%, 0%, 83.7%, 44.7%)
CIE-LAB	lab(53.78, -31.61, 52.57)
CIE-LCH	lch(53.78, 61.34, 121.02°)
OKLab	oklab(59.09% -0.091 0.115)
OKLCH	oklch(59.09% 0.147 128.4)
XYZ	xyz(14.8251, 21.7639, 4.2302)
Luminance	0.2176 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638D17 #41178D

analogous

#8D7C17 #638D17 #288D17

triadic

#638D17 #17638D #8D1763

tetradic

#638D17 #178D7C #41178D #8D1728

square

#638D17 #178D7C #41178D #8D1728

split-complementary

#638D17 #17288D #7C178D

monochromatic

#192406 #3E580E #638D17 #88C220 #A6E03F

Accessibility & contrast

On white

3.92

#638D17 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.35

#638D17 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638D17

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638D17	#FFFFFF	#000000	##000000
##638D17	1.00	3.92	5.35	5.35
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.35	21.00	1.00	1.00
##000000	5.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#948200

Deuteranopia (green-blind)

#8F8025

Tritanopia (blue-blind)

#678678

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #638d17;
/* rgb */ color: rgb(99, 141, 23);
/* oklch */ color: oklch(59.1% 0.147 128.4);

Tailwind

colors: {
  custom: {
    50: '#94ae60',
    500: '#638d17',
    950: '#000000',
  },
}

SCSS

$custom: #638d17;
$custom-light: #94ae60;
$custom-dark: #000000;

JSON

{
  "hex": "#638d17",
  "rgb": {
    "r": 99,
    "g": 141,
    "b": 23
  },
  "hsl": {
    "h": 81.356,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.59087,
    "c": 0.14661,
    "h": 128.4
  },
  "luminance": 0.21764
}

Semantic roles & 50–950 ramp

primary

#638D17

secondary

#6D40C0

accent

#39EF7A

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0E1005

muted

#7E7F7A

Preview Lab

Preview with #638D17

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

Preview Lab → · Contrast checker → · Palette generator →