#637D2B#637D2B

#637D2B is a mid, moderate yellow-green. Relative luminance 0.175; OKLCH L 55.2% C 0.113 H 125.0°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#637D2B
RGB	rgb(99, 125, 43)
HSL	hsl(79, 49%, 33%)
HSV	hsv(79, 66%, 49%)
CMYK	cmyk(20.8%, 0%, 65.6%, 51%)
CIE-LAB	lab(48.88, -22.59, 40.33)
CIE-LCH	lch(48.88, 46.22, 119.25°)
OKLab	oklab(55.16% -0.0646 0.0924)
OKLCH	oklch(55.16% 0.113 125)
XYZ	xyz(12.9153, 17.4942, 4.9813)
Luminance	0.1749 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637D2B #452B7D

analogous

#7D6E2B #637D2B #3A7D2B

triadic

#637D2B #2B637D #7D2B63

tetradic

#637D2B #2B7D6E #452B7D #7D2B3A

square

#637D2B #2B7D6E #452B7D #7D2B3A

split-complementary

#637D2B #2B3A7D #6E2B7D

monochromatic

#1B220C #3F4F1B #637D2B #87AB3B #A5C75C

Accessibility & contrast

On white

4.67

#637D2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#637D2B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #637D2B

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637D2B	#FFFFFF	#000000	##FFFFFF
##637D2B	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#847521

Deuteranopia (green-blind)

#807431

Tritanopia (blue-blind)

#67776C

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #637d2b;
/* rgb */ color: rgb(99, 125, 43);
/* oklch */ color: oklch(55.2% 0.113 125.0);

Tailwind

colors: {
  custom: {
    50: '#92a268',
    500: '#637d2b',
    950: '#000000',
  },
}

SCSS

$custom: #637d2b;
$custom-light: #92a268;
$custom-dark: #000000;

JSON

{
  "hex": "#637d2b",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 43
  },
  "hsl": {
    "h": 79.024,
    "s": 48.81,
    "l": 32.941
  },
  "oklch": {
    "l": 0.55155,
    "c": 0.11278,
    "h": 125
  },
  "luminance": 0.17494
}

Semantic roles & 50–950 ramp

primary

#637D2B

secondary

#7257AD

accent

#4FD87B

background

#F9FAF6

surface

#F1F3EB

border

#CBCDC6

text

#0D0F06

muted

#7E7F7A

Preview Lab

Preview with #637D2B

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

Preview Lab → · Contrast checker → · Palette generator →