#637818#637818

#637818 is a mid, moderate yellow-green. Relative luminance 0.162; OKLCH L 53.7% C 0.120 H 121.7°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#637818
RGB	rgb(99, 120, 24)
HSL	hsl(73, 67%, 28%)
HSV	hsv(73, 80%, 47%)
CMYK	cmyk(17.5%, 0%, 80%, 52.9%)
CIE-LAB	lab(47.17, -21.27, 46.26)
CIE-LCH	lch(47.17, 50.92, 114.70°)
OKLab	oklab(53.74% -0.0628 0.1018)
OKLCH	oklch(53.74% 0.12 121.7)
XYZ	xyz(12.0271, 16.1515, 3.3479)
Luminance	0.1615 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637818 #2D1878

analogous

#785D18 #637818 #337818

triadic

#637818 #186378 #781863

tetradic

#637818 #18785D #2D1878 #781833

square

#637818 #18785D #2D1878 #781833

split-complementary

#637818 #183378 #5D1878

monochromatic

#151A05 #39450E #637818 #8DAB22 #B3D634

Accessibility & contrast

On white

4.96

#637818 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#637818 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #637818

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637818	#FFFFFF	#000000	##FFFFFF
##637818	1.00	4.96	4.23	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#807000

Deuteranopia (green-blind)

#7D7021

Tritanopia (blue-blind)

#697166

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #637818;
/* rgb */ color: rgb(99, 120, 24);
/* oklch */ color: oklch(53.7% 0.120 121.7);

Tailwind

colors: {
  custom: {
    50: '#929f5e',
    500: '#637818',
    950: '#000000',
  },
}

SCSS

$custom: #637818;
$custom-light: #929f5e;
$custom-dark: #000000;

JSON

{
  "hex": "#637818",
  "rgb": {
    "r": 99,
    "g": 120,
    "b": 24
  },
  "hsl": {
    "h": 73.125,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.53735,
    "c": 0.1196,
    "h": 121.7
  },
  "luminance": 0.16152
}

Semantic roles & 50–950 ramp

primary

#637818

secondary

#573FAD

accent

#3EEA64

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0D0E05

muted

#7E7E79

Preview Lab

Preview with #637818

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

Preview Lab → · Contrast checker → · Palette generator →