#643C44#643C44

#643C44 is a dark, muted red. Relative luminance 0.064; OKLCH L 40.6% C 0.057 H 6.9°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#643C44
RGB	rgb(100, 60, 68)
HSL	hsl(348, 25%, 31%)
HSV	hsv(348, 40%, 39%)
CMYK	cmyk(0%, 40%, 32%, 60.8%)
CIE-LAB	lab(30.30, 18.77, 2.56)
CIE-LCH	lch(30.30, 18.95, 7.77°)
OKLab	oklab(40.64% 0.0569 0.0069)
OKLCH	oklch(40.64% 0.057 6.9)
XYZ	xyz(7.9150, 6.3590, 6.2782)
Luminance	0.0636 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C44 #3C645C

analogous

#643C58 #643C44 #64483C

triadic

#643C44 #44643C #3C4464

tetradic

#643C44 #58643C #3C645C #483C64

square

#643C44 #58643C #3C645C #483C64

split-complementary

#643C44 #3C6448 #3C5864

monochromatic

#180E10 #3E252A #643C44 #8A535E #AA717C

Accessibility & contrast

On white

9.24

#643C44 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#643C44 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C44

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C44	#FFFFFF	#000000	##FFFFFF
##643C44	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#424344

Deuteranopia (green-blind)

#4C4A43

Tritanopia (blue-blind)

#6B393F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643c44;
/* rgb */ color: rgb(100, 60, 68);
/* oklch */ color: oklch(40.6% 0.057 6.9);

Tailwind

colors: {
  custom: {
    50: '#917277',
    500: '#643c44',
    950: '#000000',
  },
}

SCSS

$custom: #643c44;
$custom-light: #917277;
$custom-dark: #000000;

JSON

{
  "hex": "#643c44",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 68
  },
  "hsl": {
    "h": 348,
    "s": 25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.40639,
    "c": 0.0573,
    "h": 6.9
  },
  "luminance": 0.06358
}

Semantic roles & 50–950 ramp

primary

#643C44

secondary

#68948B

accent

#C1AF66

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643C44

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

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