#643B3E#643B3E

#643B3E is a dark, muted red. Relative luminance 0.062; OKLCH L 40.3% C 0.058 H 15.3°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#643B3E
RGB	rgb(100, 59, 62)
HSL	hsl(356, 26%, 31%)
HSV	hsv(356, 41%, 39%)
CMYK	cmyk(0%, 41%, 38%, 60.8%)
CIE-LAB	lab(29.88, 18.51, 5.86)
CIE-LCH	lch(29.88, 19.41, 17.58°)
OKLab	oklab(40.26% 0.0561 0.0153)
OKLCH	oklch(40.26% 0.058 15.3)
XYZ	xyz(7.6893, 6.1857, 5.3455)
Luminance	0.0619 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B3E #3B6461

analogous

#643B52 #643B3E #644C3B

triadic

#643B3E #3E643B #3B3E64

tetradic

#643B3E #52643B #3B6461 #4C3B64

square

#643B3E #52643B #3B6461 #4C3B64

split-complementary

#643B3E #3B644C #3B5264

monochromatic

#170E0E #3E2426 #643B3E #8A5256 #AA6F74

Accessibility & contrast

On white

9.39

#643B3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#643B3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B3E

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B3E	#FFFFFF	#000000	##FFFFFF
##643B3E	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#43423E

Deuteranopia (green-blind)

#4D493D

Tritanopia (blue-blind)

#6B373C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643b3e;
/* rgb */ color: rgb(100, 59, 62);
/* oklch */ color: oklch(40.3% 0.058 15.3);

Tailwind

colors: {
  custom: {
    50: '#927173',
    500: '#643b3e',
    950: '#000000',
  },
}

SCSS

$custom: #643b3e;
$custom-light: #927173;
$custom-dark: #000000;

JSON

{
  "hex": "#643b3e",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 62
  },
  "hsl": {
    "h": 355.61,
    "s": 25.786,
    "l": 31.176
  },
  "oklch": {
    "l": 0.40258,
    "c": 0.05815,
    "h": 15.3
  },
  "luminance": 0.06185
}

Semantic roles & 50–950 ramp

primary

#643B3E

secondary

#679491

accent

#C2BB66

background

#F9F6F6

surface

#F1ECEC

border

#CBC7C7

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643B3E

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

Preview Lab → · Contrast checker → · Palette generator →