#638F17#638F17

#638F17 is a mid, vivid yellow-green. Relative luminance 0.224; OKLCH L 59.6% C 0.149 H 128.8°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#638F17
RGB	rgb(99, 143, 23)
HSL	hsl(82, 72%, 33%)
HSV	hsv(82, 84%, 56%)
CMYK	cmyk(30.8%, 0%, 83.9%, 43.9%)
CIE-LAB	lab(54.41, -32.54, 53.13)
CIE-LCH	lch(54.41, 62.30, 121.49°)
OKLab	oklab(59.6% -0.0935 0.1162)
OKLCH	oklch(59.6% 0.149 128.8)
XYZ	xyz(15.1227, 22.3590, 4.3294)
Luminance	0.2236 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638F17 #43178F

analogous

#8F7F17 #638F17 #278F17

triadic

#638F17 #17638F #8F1763

tetradic

#638F17 #178F7F #43178F #8F1727

square

#638F17 #178F7F #43178F #8F1727

split-complementary

#638F17 #17278F #7F178F

monochromatic

#1A2606 #3F5A0F #638F17 #87C41F #A6E040

Accessibility & contrast

On white

3.84

#638F17 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#638F17 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638F17

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638F17	#FFFFFF	#000000	##000000
##638F17	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#968400

Deuteranopia (green-blind)

#908125

Tritanopia (blue-blind)

#66887A

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #638f17;
/* rgb */ color: rgb(99, 143, 23);
/* oklch */ color: oklch(59.6% 0.149 128.8);

Tailwind

colors: {
  custom: {
    50: '#94b061',
    500: '#638f17',
    950: '#000000',
  },
}

SCSS

$custom: #638f17;
$custom-light: #94b061;
$custom-dark: #000000;

JSON

{
  "hex": "#638f17",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 23
  },
  "hsl": {
    "h": 82,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.596,
    "c": 0.1491,
    "h": 128.8
  },
  "luminance": 0.22359
}

Semantic roles & 50–950 ramp

primary

#638F17

secondary

#7041C1

accent

#39EF7C

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0E1005

muted

#7E7F7A

Preview Lab

Preview with #638F17

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

Preview Lab → · Contrast checker → · Palette generator →