#637C12#637C12

#637C12 is a mid, vivid yellow-green. Relative luminance 0.171; OKLCH L 54.7% C 0.128 H 123.0°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#637C12
RGB	rgb(99, 124, 18)
HSL	hsl(74, 75%, 28%)
HSV	hsv(74, 85%, 49%)
CMYK	cmyk(20.2%, 0%, 85.5%, 51.4%)
CIE-LAB	lab(48.40, -23.57, 49.20)
CIE-LCH	lch(48.40, 54.55, 115.60°)
OKLab	oklab(54.72% -0.0695 0.107)
OKLCH	oklch(54.72% 0.128 123)
XYZ	xyz(12.4626, 17.1116, 3.2184)
Luminance	0.1711 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637C12 #2B127C

analogous

#7C6012 #637C12 #2E7C12

triadic

#637C12 #12637C #7C1263

tetradic

#637C12 #127C60 #2B127C #7C122E

square

#637C12 #127C60 #2B127C #7C122E

split-complementary

#637C12 #122E7C #60127C

monochromatic

#151B04 #38470A #637C12 #8EB11A #B5E029

Accessibility & contrast

On white

4.75

#637C12 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#637C12 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #637C12

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637C12	#FFFFFF	#000000	##FFFFFF
##637C12	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#847400

Deuteranopia (green-blind)

#81731E

Tritanopia (blue-blind)

#697569

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #637c12;
/* rgb */ color: rgb(99, 124, 18);
/* oklch */ color: oklch(54.7% 0.128 123.0);

Tailwind

colors: {
  custom: {
    50: '#93a25c',
    500: '#637c12',
    950: '#000000',
  },
}

SCSS

$custom: #637c12;
$custom-light: #93a25c;
$custom-dark: #000000;

JSON

{
  "hex": "#637c12",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 18
  },
  "hsl": {
    "h": 74.151,
    "s": 74.648,
    "l": 27.843
  },
  "oklch": {
    "l": 0.54718,
    "c": 0.12757,
    "h": 123
  },
  "luminance": 0.17112
}

Semantic roles & 50–950 ramp

primary

#637C12

secondary

#5538B2

accent

#37F163

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0D0F04

muted

#7E7E79

Preview Lab

Preview with #637C12

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

Preview Lab → · Contrast checker → · Palette generator →