#643E47#643E47

#643E47 is a dark, muted red. Relative luminance 0.066; OKLCH L 41.1% C 0.055 H 4.3°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#643E47
RGB	rgb(100, 62, 71)
HSL	hsl(346, 23%, 32%)
HSV	hsv(346, 38%, 39%)
CMYK	cmyk(0%, 38%, 29%, 60.8%)
CIE-LAB	lab(30.90, 18.01, 1.48)
CIE-LCH	lch(30.90, 18.07, 4.71°)
OKLab	oklab(41.13% 0.0545 0.0041)
OKLCH	oklch(41.13% 0.055 4.3)
XYZ	xyz(8.1157, 6.6100, 6.8084)
Luminance	0.0661 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E47 #3E645B

analogous

#643E5A #643E47 #64483E

triadic

#643E47 #47643E #3E4764

tetradic

#643E47 #5A643E #3E645B #483E64

square

#643E47 #5A643E #3E645B #483E64

split-complementary

#643E47 #3E6448 #3E5A64

monochromatic

#180F11 #3E272C #643E47 #8A5562 #A97480

Accessibility & contrast

On white

9.04

#643E47 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#643E47 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E47

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E47	#FFFFFF	#000000	##FFFFFF
##643E47	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444547

Deuteranopia (green-blind)

#4D4B46

Tritanopia (blue-blind)

#6A3B41

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #643e47;
/* rgb */ color: rgb(100, 62, 71);
/* oklch */ color: oklch(41.1% 0.055 4.3);

Tailwind

colors: {
  custom: {
    50: '#91747a',
    500: '#643e47',
    950: '#000000',
  },
}

SCSS

$custom: #643e47;
$custom-light: #91747a;
$custom-dark: #000000;

JSON

{
  "hex": "#643e47",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 71
  },
  "hsl": {
    "h": 345.789,
    "s": 23.457,
    "l": 31.765
  },
  "oklch": {
    "l": 0.41128,
    "c": 0.05463,
    "h": 4.3
  },
  "luminance": 0.0661
}

Semantic roles & 50–950 ramp

primary

#643E47

secondary

#6A948A

accent

#C0AB68

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0809

muted

#7E7B7B

Preview Lab

Preview with #643E47

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

Preview Lab → · Contrast checker → · Palette generator →