#637F12#637F12

#637F12 is a mid, vivid yellow-green. Relative luminance 0.179; OKLCH L 55.5% C 0.131 H 124.1°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#637F12
RGB	rgb(99, 127, 18)
HSL	hsl(75, 75%, 28%)
HSV	hsv(75, 86%, 50%)
CMYK	cmyk(22%, 0%, 85.8%, 50.2%)
CIE-LAB	lab(49.34, -25.07, 50.02)
CIE-LCH	lch(49.34, 55.95, 116.62°)
OKLab	oklab(55.48% -0.0736 0.1087)
OKLCH	oklch(55.48% 0.131 124.1)
XYZ	xyz(12.8443, 17.8749, 3.3457)
Luminance	0.1787 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637F12 #2E127F

analogous

#7F6412 #637F12 #2C7F12

triadic

#637F12 #12637F #7F1263

tetradic

#637F12 #127F64 #2E127F #7F122C

square

#637F12 #127F64 #2E127F #7F122C

split-complementary

#637F12 #122C7F #64127F

monochromatic

#151B04 #39490A #637F12 #8DB51A #B2E12B

Accessibility & contrast

On white

4.59

#637F12 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#637F12 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #637F12

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637F12	#FFFFFF	#000000	##FFFFFF
##637F12	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#877600

Deuteranopia (green-blind)

#83751F

Tritanopia (blue-blind)

#68786C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #637f12;
/* rgb */ color: rgb(99, 127, 18);
/* oklch */ color: oklch(55.5% 0.131 124.1);

Tailwind

colors: {
  custom: {
    50: '#93a45c',
    500: '#637f12',
    950: '#000000',
  },
}

SCSS

$custom: #637f12;
$custom-light: #93a45c;
$custom-dark: #000000;

JSON

{
  "hex": "#637f12",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 18
  },
  "hsl": {
    "h": 75.413,
    "s": 75.172,
    "l": 28.431
  },
  "oklch": {
    "l": 0.55482,
    "c": 0.13129,
    "h": 124.1
  },
  "luminance": 0.17875
}

Semantic roles & 50–950 ramp

primary

#637F12

secondary

#5838B5

accent

#36F266

background

#F9FAF5

surface

#F2F4E9

border

#CCCEC5

text

#0D0F05

muted

#7E7F79

Preview Lab

Preview with #637F12

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

Preview Lab → · Contrast checker → · Palette generator →