#643A42#643A42

#643A42 is a dark, moderate red. Relative luminance 0.061; OKLCH L 40.2% C 0.060 H 7.8°. Best body text is #FFFFFF at 9.43:1 contrast (WCAG AA passes).

Color values

HEX	#643A42
RGB	rgb(100, 58, 66)
HSL	hsl(349, 27%, 31%)
HSV	hsv(349, 42%, 39%)
CMYK	cmyk(0%, 42%, 34%, 60.8%)
CIE-LAB	lab(29.74, 19.70, 3.05)
CIE-LCH	lch(29.74, 19.93, 8.82°)
OKLab	oklab(40.19% 0.0597 0.0082)
OKLCH	oklch(40.19% 0.06 7.8)
XYZ	xyz(7.7522, 6.1294, 5.9280)
Luminance	0.0613 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A42 #3A645C

analogous

#643A57 #643A42 #64473A

triadic

#643A42 #42643A #3A4264

tetradic

#643A42 #57643A #3A645C #473A64

square

#643A42 #57643A #3A645C #473A64

split-complementary

#643A42 #3A6447 #3A5764

monochromatic

#170D0F #3D2428 #643A42 #8B505C #AB6E79

Accessibility & contrast

On white

9.43

#643A42 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#643A42 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A42

9.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A42	#FFFFFF	#000000	##FFFFFF
##643A42	1.00	9.43	2.23	9.43
#FFFFFF	9.43	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#414142

Deuteranopia (green-blind)

#4B4941

Tritanopia (blue-blind)

#6B363D

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643a42;
/* rgb */ color: rgb(100, 58, 66);
/* oklch */ color: oklch(40.2% 0.060 7.8);

Tailwind

colors: {
  custom: {
    50: '#927176',
    500: '#643a42',
    950: '#000000',
  },
}

SCSS

$custom: #643a42;
$custom-light: #927176;
$custom-dark: #000000;

JSON

{
  "hex": "#643a42",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 66
  },
  "hsl": {
    "h": 348.571,
    "s": 26.582,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40188,
    "c": 0.06027,
    "h": 7.8
  },
  "luminance": 0.06129
}

Semantic roles & 50–950 ramp

primary

#643A42

secondary

#66948B

accent

#C3B165

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0708

muted

#7E7A7B

Preview Lab

Preview with #643A42

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

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