#637918#637918

#637918 is a mid, vivid yellow-green. Relative luminance 0.164; OKLCH L 54.0% C 0.121 H 122.1°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#637918
RGB	rgb(99, 121, 24)
HSL	hsl(74, 67%, 28%)
HSV	hsv(74, 80%, 47%)
CMYK	cmyk(18.2%, 0%, 80.2%, 52.5%)
CIE-LAB	lab(47.49, -21.79, 46.55)
CIE-LCH	lch(47.49, 51.40, 115.08°)
OKLab	oklab(53.99% -0.0642 0.1024)
OKLCH	oklch(53.99% 0.121 122.1)
XYZ	xyz(12.1480, 16.3933, 3.3882)
Luminance	0.1639 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637918 #2E1879

analogous

#795E18 #637918 #327918

triadic

#637918 #186379 #791863

tetradic

#637918 #18795E #2E1879 #791832

square

#637918 #18795E #2E1879 #791832

split-complementary

#637918 #183279 #5E1879

monochromatic

#151A05 #39460E #637918 #8DAC22 #B2D735

Accessibility & contrast

On white

4.91

#637918 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#637918 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #637918

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637918	#FFFFFF	#000000	##FFFFFF
##637918	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#817100

Deuteranopia (green-blind)

#7E7121

Tritanopia (blue-blind)

#697267

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #637918;
/* rgb */ color: rgb(99, 121, 24);
/* oklch */ color: oklch(54.0% 0.121 122.1);

Tailwind

colors: {
  custom: {
    50: '#939f5e',
    500: '#637918',
    950: '#000000',
  },
}

SCSS

$custom: #637918;
$custom-light: #939f5e;
$custom-dark: #000000;

JSON

{
  "hex": "#637918",
  "rgb": {
    "r": 99,
    "g": 121,
    "b": 24
  },
  "hsl": {
    "h": 73.608,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.53988,
    "c": 0.12087,
    "h": 122.1
  },
  "luminance": 0.16393
}

Semantic roles & 50–950 ramp

primary

#637918

secondary

#583FAE

accent

#3EEA65

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0D0E05

muted

#7E7E79

Preview Lab

Preview with #637918

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

Preview Lab → · Contrast checker → · Palette generator →