#643F47#643F47

#643F47 is a dark, muted red. Relative luminance 0.067; OKLCH L 41.3% C 0.053 H 5.5°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#643F47
RGB	rgb(100, 63, 71)
HSL	hsl(347, 23%, 32%)
HSV	hsv(347, 37%, 39%)
CMYK	cmyk(0%, 37%, 29%, 60.8%)
CIE-LAB	lab(31.16, 17.39, 1.86)
CIE-LCH	lch(31.16, 17.49, 6.10°)
OKLab	oklab(41.33% 0.0526 0.0051)
OKLCH	oklch(41.33% 0.053 5.5)
XYZ	xyz(8.1706, 6.7198, 6.8267)
Luminance	0.0672 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F47 #3F645C

analogous

#643F5A #643F47 #644A3F

triadic

#643F47 #47643F #3F4764

tetradic

#643F47 #5A643F #3F645C #4A3F64

square

#643F47 #5A643F #3F645C #4A3F64

split-complementary

#643F47 #3F644A #3F5A64

monochromatic

#191012 #3E272C #643F47 #8A5762 #A87580

Accessibility & contrast

On white

8.96

#643F47 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#643F47 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F47

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F47	#FFFFFF	#000000	##FFFFFF
##643F47	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454547

Deuteranopia (green-blind)

#4E4C46

Tritanopia (blue-blind)

#6A3C42

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #643f47;
/* rgb */ color: rgb(100, 63, 71);
/* oklch */ color: oklch(41.3% 0.053 5.5);

Tailwind

colors: {
  custom: {
    50: '#91747a',
    500: '#643f47',
    950: '#000000',
  },
}

SCSS

$custom: #643f47;
$custom-light: #91747a;
$custom-dark: #000000;

JSON

{
  "hex": "#643f47",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 71
  },
  "hsl": {
    "h": 347.027,
    "s": 22.699,
    "l": 31.961
  },
  "oklch": {
    "l": 0.41326,
    "c": 0.05287,
    "h": 5.5
  },
  "luminance": 0.06719
}

Semantic roles & 50–950 ramp

primary

#643F47

secondary

#6B948B

accent

#BFAC69

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0809

muted

#7E7B7B

Preview Lab

Preview with #643F47

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

Preview Lab → · Contrast checker → · Palette generator →