#638B23#638B23

#638B23 is a mid, vivid yellow-green. Relative luminance 0.212; OKLCH L 58.6% C 0.138 H 128.6°. Best body text is #000000 at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#638B23
RGB	rgb(99, 139, 35)
HSL	hsl(83, 60%, 34%)
HSV	hsv(83, 75%, 55%)
CMYK	cmyk(28.8%, 0%, 74.8%, 45.5%)
CIE-LAB	lab(53.21, -30.04, 48.11)
CIE-LCH	lch(53.21, 56.72, 121.98°)
OKLab	oklab(58.65% -0.0858 0.1076)
OKLCH	oklch(58.65% 0.138 128.6)
XYZ	xyz(14.6816, 21.2389, 4.9158)
Luminance	0.2124 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638B23 #4B238B

analogous

#8B7F23 #638B23 #2F8B23

triadic

#638B23 #23638B #8B2363

tetradic

#638B23 #238B7F #4B238B #8B232F

square

#638B23 #238B7F #4B238B #8B232F

split-complementary

#638B23 #232F8B #7F238B

monochromatic

#1D290A #405A17 #638B23 #86BC2F #A3D454

Accessibility & contrast

On white

4.00

#638B23 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.25

#638B23 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638B23

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638B23	#FFFFFF	#000000	##000000
##638B23	1.00	4.00	5.25	5.25
#FFFFFF	4.00	1.00	21.00	21.00
#000000	5.25	21.00	1.00	1.00
##000000	5.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#92810F

Deuteranopia (green-blind)

#8C7E2D

Tritanopia (blue-blind)

#668577

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #638b23;
/* rgb */ color: rgb(99, 139, 35);
/* oklch */ color: oklch(58.6% 0.138 128.6);

Tailwind

colors: {
  custom: {
    50: '#93ad66',
    500: '#638b23',
    950: '#000000',
  },
}

SCSS

$custom: #638b23;
$custom-light: #93ad66;
$custom-dark: #000000;

JSON

{
  "hex": "#638b23",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 35
  },
  "hsl": {
    "h": 83.077,
    "s": 59.77,
    "l": 34.118
  },
  "oklch": {
    "l": 0.58647,
    "c": 0.13762,
    "h": 128.6
  },
  "luminance": 0.21239
}

Semantic roles & 50–950 ramp

primary

#638B23

secondary

#7952B8

accent

#45E382

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0D1006

muted

#7E7F7A

Preview Lab

Preview with #638B23

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

Preview Lab → · Contrast checker → · Palette generator →