#643A41#643A41

#643A41 is a dark, moderate red. Relative luminance 0.061; OKLCH L 40.2% C 0.060 H 9.3°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#643A41
RGB	rgb(100, 58, 65)
HSL	hsl(350, 27%, 31%)
HSV	hsv(350, 42%, 39%)
CMYK	cmyk(0%, 42%, 35%, 60.8%)
CIE-LAB	lab(29.71, 19.55, 3.67)
CIE-LCH	lch(29.71, 19.89, 10.62°)
OKLab	oklab(40.16% 0.0593 0.0098)
OKLCH	oklch(40.16% 0.06 9.3)
XYZ	xyz(7.7230, 6.1177, 5.7741)
Luminance	0.0612 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A41 #3A645D

analogous

#643A56 #643A41 #64483A

triadic

#643A41 #41643A #3A4164

tetradic

#643A41 #56643A #3A645D #483A64

square

#643A41 #56643A #3A645D #483A64

split-complementary

#643A41 #3A6448 #3A5664

monochromatic

#170D0F #3D2428 #643A41 #8B505A #AB6E78

Accessibility & contrast

On white

9.44

#643A41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#643A41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A41

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A41	#FFFFFF	#000000	##FFFFFF
##643A41	1.00	9.44	2.22	9.44
#FFFFFF	9.44	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#414141

Deuteranopia (green-blind)

#4B4940

Tritanopia (blue-blind)

#6B363C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643a41;
/* rgb */ color: rgb(100, 58, 65);
/* oklch */ color: oklch(40.2% 0.060 9.3);

Tailwind

colors: {
  custom: {
    50: '#927175',
    500: '#643a41',
    950: '#000000',
  },
}

SCSS

$custom: #643a41;
$custom-light: #927175;
$custom-dark: #000000;

JSON

{
  "hex": "#643a41",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 65
  },
  "hsl": {
    "h": 350,
    "s": 26.582,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40157,
    "c": 0.06008,
    "h": 9.3
  },
  "luminance": 0.06117
}

Semantic roles & 50–950 ramp

primary

#643A41

secondary

#66948C

accent

#C3B365

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0708

muted

#7E7A7B

Preview Lab

Preview with #643A41

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

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