#646C56#646C56

#646C56 is a mid, muted yellow-green. Relative luminance 0.141; OKLCH L 51.8% C 0.035 H 123.9°. Best body text is #FFFFFF at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#646C56
RGB	rgb(100, 108, 86)
HSL	hsl(82, 11%, 38%)
HSV	hsv(82, 20%, 42%)
CMYK	cmyk(7.4%, 0%, 20.4%, 57.6%)
CIE-LAB	lab(44.38, -7.39, 11.31)
CIE-LCH	lch(44.38, 13.51, 123.16°)
OKLab	oklab(51.79% -0.0194 0.029)
OKLCH	oklch(51.79% 0.035 123.9)
XYZ	xyz(12.2976, 14.1063, 10.8772)
Luminance	0.1411 (WCAG relative)
Temperature	neutral
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C56 #5E566C

analogous

#6C6956 #646C56 #596C56

triadic

#646C56 #56646C #6C5664

tetradic

#646C56 #566C69 #5E566C #6C5659

square

#646C56 #566C69 #5E566C #6C5659

split-complementary

#646C56 #56596C #69566C

monochromatic

#252820 #444A3B #646C56 #848E71 #A1A993

Accessibility & contrast

On white

5.50

#646C56 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.82

#646C56 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C56

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C56	#FFFFFF	#000000	##FFFFFF
##646C56	1.00	5.50	3.82	5.50
#FFFFFF	5.50	1.00	21.00	1.00
#000000	3.82	21.00	1.00	21.00
##FFFFFF	5.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F6955

Deuteranopia (green-blind)

#6E6957

Tritanopia (blue-blind)

#666A66

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #646c56;
/* rgb */ color: rgb(100, 108, 86);
/* oklch */ color: oklch(51.8% 0.035 123.9);

Tailwind

colors: {
  custom: {
    50: '#909685',
    500: '#646c56',
    950: '#000000',
  },
}

SCSS

$custom: #646c56;
$custom-light: #909685;
$custom-dark: #000000;

JSON

{
  "hex": "#646c56",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 86
  },
  "hsl": {
    "h": 81.818,
    "s": 11.34,
    "l": 38.039
  },
  "oklch": {
    "l": 0.5179,
    "c": 0.03491,
    "h": 123.9
  },
  "luminance": 0.14106
}

Semantic roles & 50–950 ramp

primary

#646C56

secondary

#8C8698

accent

#74B48B

background

#F8F9F8

surface

#F0F1EF

border

#CBCBCA

text

#0C0D0B

muted

#7D7E7C

Preview Lab

Preview with #646C56

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

Preview Lab → · Contrast checker → · Palette generator →