#643C41#643C41

#643C41 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.5% C 0.057 H 11.8°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#643C41
RGB	rgb(100, 60, 65)
HSL	hsl(353, 25%, 31%)
HSV	hsv(353, 40%, 39%)
CMYK	cmyk(0%, 40%, 35%, 60.8%)
CIE-LAB	lab(30.21, 18.32, 4.39)
CIE-LCH	lch(30.21, 18.84, 13.48°)
OKLab	oklab(40.54% 0.0556 0.0116)
OKLCH	oklch(40.54% 0.057 11.8)
XYZ	xyz(7.8258, 6.3233, 5.8083)
Luminance	0.0632 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C41 #3C645F

analogous

#643C55 #643C41 #644B3C

triadic

#643C41 #41643C #3C4164

tetradic

#643C41 #55643C #3C645F #4B3C64

square

#643C41 #55643C #3C645F #4B3C64

split-complementary

#643C41 #3C644B #3C5564

monochromatic

#180E0F #3E2528 #643C41 #8A535A #AA7178

Accessibility & contrast

On white

9.27

#643C41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#643C41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C41

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C41	#FFFFFF	#000000	##FFFFFF
##643C41	1.00	9.27	2.26	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#434341

Deuteranopia (green-blind)

#4D4A40

Tritanopia (blue-blind)

#6B383E

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643c41;
/* rgb */ color: rgb(100, 60, 65);
/* oklch */ color: oklch(40.5% 0.057 11.8);

Tailwind

colors: {
  custom: {
    50: '#917275',
    500: '#643c41',
    950: '#000000',
  },
}

SCSS

$custom: #643c41;
$custom-light: #917275;
$custom-dark: #000000;

JSON

{
  "hex": "#643c41",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 65
  },
  "hsl": {
    "h": 352.5,
    "s": 25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.40544,
    "c": 0.05677,
    "h": 11.8
  },
  "luminance": 0.06323
}

Semantic roles & 50–950 ramp

primary

#643C41

secondary

#68948E

accent

#C1B666

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643C41

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

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