#643137#643137

#643137 is a dark, moderate red. Relative luminance 0.052; OKLCH L 38.2% C 0.074 H 13.8°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#643137
RGB	rgb(100, 49, 55)
HSL	hsl(353, 34%, 29%)
HSV	hsv(353, 51%, 39%)
CMYK	cmyk(0%, 51%, 45%, 60.8%)
CIE-LAB	lab(27.25, 23.60, 6.76)
CIE-LCH	lch(27.25, 24.55, 15.98°)
OKLab	oklab(38.19% 0.0714 0.0175)
OKLCH	oklch(38.19% 0.074 13.8)
XYZ	xyz(7.0438, 5.1825, 4.2430)
Luminance	0.0518 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643137 #31645E

analogous

#643151 #643137 #644531

triadic

#643137 #376431 #313764

tetradic

#643137 #516431 #31645E #453164

square

#643137 #516431 #31645E #453164

split-complementary

#643137 #316445 #315164

monochromatic

#150A0B #3B1D20 #643137 #8D454E #B15F68

Accessibility & contrast

On white

10.31

#643137 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#643137 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643137

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643137	#FFFFFF	#000000	##FFFFFF
##643137	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B3A37

Deuteranopia (green-blind)

#484436

Tritanopia (blue-blind)

#6C2B33

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #643137;
/* rgb */ color: rgb(100, 49, 55);
/* oklch */ color: oklch(38.2% 0.074 13.8);

Tailwind

colors: {
  custom: {
    50: '#936a6d',
    500: '#643137',
    950: '#000000',
  },
}

SCSS

$custom: #643137;
$custom-light: #936a6d;
$custom-dark: #000000;

JSON

{
  "hex": "#643137",
  "rgb": {
    "r": 100,
    "g": 49,
    "b": 55
  },
  "hsl": {
    "h": 352.941,
    "s": 34.228,
    "l": 29.216
  },
  "oklch": {
    "l": 0.38194,
    "c": 0.07354,
    "h": 13.8
  },
  "luminance": 0.05182
}

Semantic roles & 50–950 ramp

primary

#643137

secondary

#5C958E

accent

#CABE5D

background

#F9F6F6

surface

#F2EBEB

border

#CCC6C6

text

#0D0607

muted

#7E7A7A

Preview Lab

Preview with #643137

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

Preview Lab → · Contrast checker → · Palette generator →