#638D1B#638D1B

#638D1B is a mid, vivid yellow-green. Relative luminance 0.218; OKLCH L 59.1% C 0.145 H 128.6°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#638D1B
RGB	rgb(99, 141, 27)
HSL	hsl(82, 68%, 33%)
HSV	hsv(82, 81%, 55%)
CMYK	cmyk(29.8%, 0%, 80.9%, 44.7%)
CIE-LAB	lab(53.79, -31.43, 51.40)
CIE-LCH	lch(53.79, 60.25, 121.44°)
OKLab	oklab(59.11% -0.0902 0.1132)
OKLCH	oklch(59.11% 0.145 128.6)
XYZ	xyz(14.8683, 21.7811, 4.4575)
Luminance	0.2178 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638D1B #451B8D

analogous

#8D7E1B #638D1B #2A8D1B

triadic

#638D1B #1B638D #8D1B63

tetradic

#638D1B #1B8D7E #451B8D #8D1B2A

square

#638D1B #1B8D7E #451B8D #8D1B2A

split-complementary

#638D1B #1B2A8D #7E1B8D

monochromatic

#1B2607 #3F5A11 #638D1B #87C025 #A5DC47

Accessibility & contrast

On white

3.92

#638D1B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#638D1B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638D1B

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638D1B	#FFFFFF	#000000	##000000
##638D1B	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)

#948200

Deuteranopia (green-blind)

#8E8027

Tritanopia (blue-blind)

#678678

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #638d1b;
/* rgb */ color: rgb(99, 141, 27);
/* oklch */ color: oklch(59.1% 0.145 128.6);

Tailwind

colors: {
  custom: {
    50: '#93ae62',
    500: '#638d1b',
    950: '#000000',
  },
}

SCSS

$custom: #638d1b;
$custom-light: #93ae62;
$custom-dark: #000000;

JSON

{
  "hex": "#638d1b",
  "rgb": {
    "r": 99,
    "g": 141,
    "b": 27
  },
  "hsl": {
    "h": 82.105,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.59108,
    "c": 0.14473,
    "h": 128.6
  },
  "luminance": 0.21782
}

Semantic roles & 50–950 ramp

primary

#638D1B

secondary

#7246BD

accent

#3DEB7D

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0E1006

muted

#7E7F7A

Preview Lab

Preview with #638D1B

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

Preview Lab → · Contrast checker → · Palette generator →