#643E36#643E36

#643E36 is a dark, muted red. Relative luminance 0.064; OKLCH L 40.6% C 0.056 H 32.5°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#643E36
RGB	rgb(100, 62, 54)
HSL	hsl(10, 30%, 30%)
HSV	hsv(10, 46%, 39%)
CMYK	cmyk(0%, 38%, 46%, 60.8%)
CIE-LAB	lab(30.45, 15.60, 11.84)
CIE-LCH	lch(30.45, 19.59, 37.20°)
OKLab	oklab(40.64% 0.0469 0.0299)
OKLCH	oklch(40.64% 0.056 32.5)
XYZ	xyz(7.6444, 6.4215, 4.3262)
Luminance	0.0642 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E36 #365C64

analogous

#643645 #643E36 #645536

triadic

#643E36 #36643E #3E3664

tetradic

#643E36 #456436 #365C64 #553664

square

#643E36 #456436 #365C64 #553664

split-complementary

#643E36 #366455 #364564

monochromatic

#150D0B #3C2521 #643E36 #8C574B #AD7367

Accessibility & contrast

On white

9.19

#643E36 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#643E36 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E36

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E36	#FFFFFF	#000000	##FFFFFF
##643E36	1.00	9.19	2.28	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#474335

Deuteranopia (green-blind)

#504B36

Tritanopia (blue-blind)

#6C393C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643e36;
/* rgb */ color: rgb(100, 62, 54);
/* oklch */ color: oklch(40.6% 0.056 32.5);

Tailwind

colors: {
  custom: {
    50: '#92736d',
    500: '#643e36',
    950: '#000000',
  },
}

SCSS

$custom: #643e36;
$custom-light: #92736d;
$custom-dark: #000000;

JSON

{
  "hex": "#643e36",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 54
  },
  "hsl": {
    "h": 10.435,
    "s": 29.87,
    "l": 30.196
  },
  "oklch": {
    "l": 0.40635,
    "c": 0.05557,
    "h": 32.5
  },
  "luminance": 0.06421
}

Semantic roles & 50–950 ramp

primary

#643E36

secondary

#618C95

accent

#B5C662

background

#F9F7F6

surface

#F1EDEB

border

#CBC8C6

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #643E36

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

Preview Lab → · Contrast checker → · Palette generator →