#637E4E#637E4E

#637E4E is a mid, moderate yellow-green. Relative luminance 0.181; OKLCH L 55.9% C 0.077 H 132.3°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#637E4E
RGB	rgb(99, 126, 78)
HSL	hsl(94, 24%, 40%)
HSV	hsv(94, 38%, 49%)
CMYK	cmyk(21.4%, 0%, 38.1%, 50.6%)
CIE-LAB	lab(49.65, -19.02, 23.04)
CIE-LCH	lch(49.65, 29.88, 129.53°)
OKLab	oklab(55.93% -0.052 0.0571)
OKLCH	oklch(55.93% 0.077 132.3)
XYZ	xyz(13.9813, 18.1241, 9.9679)
Luminance	0.1812 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637E4E #694E7E

analogous

#7B7E4E #637E4E #4E7E51

triadic

#637E4E #4E637E #7E4E63

tetradic

#637E4E #4E7B7E #694E7E #7E514E

square

#637E4E #4E7B7E #694E7E #7E514E

split-complementary

#637E4E #514E7E #7E4E7B

monochromatic

#28321F #455837 #637E4E #81A168 #A1B98E

Accessibility & contrast

On white

4.54

#637E4E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#637E4E on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637E4E

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637E4E	#FFFFFF	#000000	##000000
##637E4E	1.00	4.54	4.62	4.62
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#82774B

Deuteranopia (green-blind)

#7E7551

Tritanopia (blue-blind)

#647A72

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #637e4e;
/* rgb */ color: rgb(99, 126, 78);
/* oklch */ color: oklch(55.9% 0.077 132.3);

Tailwind

colors: {
  custom: {
    50: '#90a380',
    500: '#637e4e',
    950: '#000000',
  },
}

SCSS

$custom: #637e4e;
$custom-light: #90a380;
$custom-dark: #000000;

JSON

{
  "hex": "#637e4e",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 78
  },
  "hsl": {
    "h": 93.75,
    "s": 23.529,
    "l": 40
  },
  "oklch": {
    "l": 0.55925,
    "c": 0.07719,
    "h": 132.3
  },
  "luminance": 0.18124
}

Semantic roles & 50–950 ramp

primary

#637E4E

secondary

#9682A6

accent

#68C099

background

#F8FAF7

surface

#F0F3EE

border

#CBCDC9

text

#0C0F0A

muted

#7D7F7C

Preview Lab

Preview with #637E4E

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

Preview Lab → · Contrast checker → · Palette generator →