#638D1F#638D1F

#638D1F is a mid, vivid yellow-green. Relative luminance 0.218; OKLCH L 59.1% C 0.143 H 128.8°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#638D1F
RGB	rgb(99, 141, 31)
HSL	hsl(83, 64%, 34%)
HSV	hsv(83, 78%, 55%)
CMYK	cmyk(29.8%, 0%, 78%, 44.7%)
CIE-LAB	lab(53.82, -31.22, 50.12)
CIE-LCH	lch(53.82, 59.05, 121.92°)
OKLab	oklab(59.13% -0.0894 0.1111)
OKLCH	oklch(59.13% 0.143 128.8)
XYZ	xyz(14.9178, 21.8009, 4.7181)
Luminance	0.2180 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638D1F #491F8D

analogous

#8D801F #638D1F #2C8D1F

triadic

#638D1F #1F638D #8D1F63

tetradic

#638D1F #1F8D80 #491F8D #8D1F2C

square

#638D1F #1F8D80 #491F8D #8D1F2C

split-complementary

#638D1F #1F2C8D #801F8D

monochromatic

#1D2909 #405B14 #638D1F #86BF2A #A3D84E

Accessibility & contrast

On white

3.92

#638D1F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#638D1F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638D1F

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638D1F	#FFFFFF	#000000	##000000
##638D1F	1.00	3.92	5.36	5.36
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.36	21.00	1.00	1.00
##000000	5.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#948204

Deuteranopia (green-blind)

#8E802A

Tritanopia (blue-blind)

#668678

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #638d1f;
/* rgb */ color: rgb(99, 141, 31);
/* oklch */ color: oklch(59.1% 0.143 128.8);

Tailwind

colors: {
  custom: {
    50: '#93ae64',
    500: '#638d1f',
    950: '#000000',
  },
}

SCSS

$custom: #638d1f;
$custom-light: #93ae64;
$custom-dark: #000000;

JSON

{
  "hex": "#638d1f",
  "rgb": {
    "r": 99,
    "g": 141,
    "b": 31
  },
  "hsl": {
    "h": 82.909,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.59132,
    "c": 0.1426,
    "h": 128.8
  },
  "luminance": 0.21801
}

Semantic roles & 50–950 ramp

primary

#638D1F

secondary

#774DBB

accent

#41E780

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0D1006

muted

#7E7F7A

Preview Lab

Preview with #638D1F

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

Preview Lab → · Contrast checker → · Palette generator →