#637D12#637D12

#637D12 is a mid, vivid yellow-green. Relative luminance 0.174; OKLCH L 55.0% C 0.129 H 123.4°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#637D12
RGB	rgb(99, 125, 18)
HSL	hsl(75, 75%, 28%)
HSV	hsv(75, 86%, 49%)
CMYK	cmyk(20.8%, 0%, 85.6%, 51%)
CIE-LAB	lab(48.71, -24.07, 49.47)
CIE-LCH	lch(48.71, 55.02, 115.95°)
OKLab	oklab(54.97% -0.0709 0.1076)
OKLCH	oklch(54.97% 0.129 123.4)
XYZ	xyz(12.5886, 17.3635, 3.2604)
Luminance	0.1736 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637D12 #2C127D

analogous

#7D6112 #637D12 #2E7D12

triadic

#637D12 #12637D #7D1263

tetradic

#637D12 #127D61 #2C127D #7D122E

square

#637D12 #127D61 #2C127D #7D122E

split-complementary

#637D12 #122E7D #61127D

monochromatic

#151B04 #39480A #637D12 #8DB21A #B4E029

Accessibility & contrast

On white

4.70

#637D12 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#637D12 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #637D12

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637D12	#FFFFFF	#000000	##FFFFFF
##637D12	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#857400

Deuteranopia (green-blind)

#81741E

Tritanopia (blue-blind)

#68766A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #637d12;
/* rgb */ color: rgb(99, 125, 18);
/* oklch */ color: oklch(55.0% 0.129 123.4);

Tailwind

colors: {
  custom: {
    50: '#93a25c',
    500: '#637d12',
    950: '#000000',
  },
}

SCSS

$custom: #637d12;
$custom-light: #93a25c;
$custom-dark: #000000;

JSON

{
  "hex": "#637d12",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 18
  },
  "hsl": {
    "h": 74.579,
    "s": 74.825,
    "l": 28.039
  },
  "oklch": {
    "l": 0.54973,
    "c": 0.12881,
    "h": 123.4
  },
  "luminance": 0.17364
}

Semantic roles & 50–950 ramp

primary

#637D12

secondary

#5638B3

accent

#36F164

background

#F9FAF5

surface

#F2F3E9

border

#CCCDC5

text

#0D0F04

muted

#7E7F79

Preview Lab

Preview with #637D12

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

Preview Lab → · Contrast checker → · Palette generator →