#638C1F#638C1F

#638C1F is a mid, vivid yellow-green. Relative luminance 0.215; OKLCH L 58.9% C 0.141 H 128.6°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#638C1F
RGB	rgb(99, 140, 31)
HSL	hsl(83, 64%, 34%)
HSV	hsv(83, 78%, 55%)
CMYK	cmyk(29.3%, 0%, 77.9%, 45.1%)
CIE-LAB	lab(53.50, -30.75, 49.82)
CIE-LCH	lch(53.50, 58.55, 121.68°)
OKLab	oklab(58.88% -0.0881 0.1105)
OKLCH	oklch(58.88% 0.141 128.6)
XYZ	xyz(14.7710, 21.5074, 4.6692)
Luminance	0.2151 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638C1F #481F8C

analogous

#8C7E1F #638C1F #2C8C1F

triadic

#638C1F #1F638C #8C1F63

tetradic

#638C1F #1F8C7E #481F8C #8C1F2C

square

#638C1F #1F8C7E #481F8C #8C1F2C

split-complementary

#638C1F #1F2C8C #7E1F8C

monochromatic

#1C2809 #405A14 #638C1F #86BE2A #A4D84E

Accessibility & contrast

On white

3.96

#638C1F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#638C1F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638C1F

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638C1F	#FFFFFF	#000000	##000000
##638C1F	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#938204

Deuteranopia (green-blind)

#8D7F2A

Tritanopia (blue-blind)

#668577

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #638c1f;
/* rgb */ color: rgb(99, 140, 31);
/* oklch */ color: oklch(58.9% 0.141 128.6);

Tailwind

colors: {
  custom: {
    50: '#93ae64',
    500: '#638c1f',
    950: '#000000',
  },
}

SCSS

$custom: #638c1f;
$custom-light: #93ae64;
$custom-dark: #000000;

JSON

{
  "hex": "#638c1f",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 31
  },
  "hsl": {
    "h": 82.569,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.58876,
    "c": 0.14132,
    "h": 128.6
  },
  "luminance": 0.21508
}

Semantic roles & 50–950 ramp

primary

#638C1F

secondary

#764CBB

accent

#41E77F

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0D1006

muted

#7E7F7A

Preview Lab

Preview with #638C1F

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

Preview Lab → · Contrast checker → · Palette generator →