#643D41#643D41

#643D41 is a dark, muted red. Relative luminance 0.064; OKLCH L 40.7% C 0.055 H 13.1°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#643D41
RGB	rgb(100, 61, 65)
HSL	hsl(354, 24%, 32%)
HSV	hsv(354, 39%, 39%)
CMYK	cmyk(0%, 39%, 35%, 60.8%)
CIE-LAB	lab(30.47, 17.71, 4.76)
CIE-LCH	lch(30.47, 18.34, 15.03°)
OKLab	oklab(40.74% 0.0537 0.0125)
OKLCH	oklch(40.74% 0.055 13.1)
XYZ	xyz(7.8787, 6.4290, 5.8260)
Luminance	0.0643 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D41 #3D6460

analogous

#643D55 #643D41 #644D3D

triadic

#643D41 #41643D #3D4164

tetradic

#643D41 #55643D #3D6460 #4D3D64

square

#643D41 #55643D #3D6460 #4D3D64

split-complementary

#643D41 #3D644D #3D5564

monochromatic

#180F10 #3E2628 #643D41 #8A545A #A97278

Accessibility & contrast

On white

9.19

#643D41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#643D41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D41

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D41	#FFFFFF	#000000	##FFFFFF
##643D41	1.00	9.19	2.29	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444341

Deuteranopia (green-blind)

#4D4B40

Tritanopia (blue-blind)

#6B393E

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643d41;
/* rgb */ color: rgb(100, 61, 65);
/* oklch */ color: oklch(40.7% 0.055 13.1);

Tailwind

colors: {
  custom: {
    50: '#917375',
    500: '#643d41',
    950: '#000000',
  },
}

SCSS

$custom: #643d41;
$custom-light: #917375;
$custom-dark: #000000;

JSON

{
  "hex": "#643d41",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 65
  },
  "hsl": {
    "h": 353.846,
    "s": 24.224,
    "l": 31.569
  },
  "oklch": {
    "l": 0.4074,
    "c": 0.05516,
    "h": 13.1
  },
  "luminance": 0.06428
}

Semantic roles & 50–950 ramp

primary

#643D41

secondary

#69948F

accent

#C1B767

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643D41

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

Preview Lab → · Contrast checker → · Palette generator →