#637D16#637D16

#637D16 is a mid, vivid yellow-green. Relative luminance 0.174; OKLCH L 55.0% C 0.127 H 123.5°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#637D16
RGB	rgb(99, 125, 22)
HSL	hsl(75, 70%, 29%)
HSV	hsv(75, 82%, 49%)
CMYK	cmyk(20.8%, 0%, 82.4%, 51%)
CIE-LAB	lab(48.73, -23.91, 48.33)
CIE-LCH	lch(48.73, 53.92, 116.32°)
OKLab	oklab(54.99% -0.0702 0.1058)
OKLCH	oklch(54.99% 0.127 123.5)
XYZ	xyz(12.6242, 17.3777, 3.4481)
Luminance	0.1738 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637D16 #30167D

analogous

#7D6416 #637D16 #307D16

triadic

#637D16 #16637D #7D1663

tetradic

#637D16 #167D64 #30167D #7D1630

square

#637D16 #167D64 #30167D #7D1630

split-complementary

#637D16 #16307D #64167D

monochromatic

#151A05 #3A490D #637D16 #8CB11F #B0DB32

Accessibility & contrast

On white

4.69

#637D16 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#637D16 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #637D16

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637D16	#FFFFFF	#000000	##FFFFFF
##637D16	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#857500

Deuteranopia (green-blind)

#817421

Tritanopia (blue-blind)

#68766A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #637d16;
/* rgb */ color: rgb(99, 125, 22);
/* oklch */ color: oklch(55.0% 0.127 123.5);

Tailwind

colors: {
  custom: {
    50: '#93a25e',
    500: '#637d16',
    950: '#000000',
  },
}

SCSS

$custom: #637d16;
$custom-light: #93a25e;
$custom-dark: #000000;

JSON

{
  "hex": "#637d16",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 22
  },
  "hsl": {
    "h": 75.146,
    "s": 70.068,
    "l": 28.824
  },
  "oklch": {
    "l": 0.54993,
    "c": 0.12697,
    "h": 123.5
  },
  "luminance": 0.17378
}

Semantic roles & 50–950 ramp

primary

#637D16

secondary

#5A3DB2

accent

#3BED68

background

#F9FAF5

surface

#F2F3E9

border

#CCCDC5

text

#0D0F05

muted

#7E7F79

Preview Lab

Preview with #637D16

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

Preview Lab → · Contrast checker → · Palette generator →