#643D3E#643D3E

#643D3E is a dark, muted red. Relative luminance 0.064; OKLCH L 40.6% C 0.055 H 18.1°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#643D3E
RGB	rgb(100, 61, 62)
HSL	hsl(358, 24%, 32%)
HSV	hsv(358, 39%, 39%)
CMYK	cmyk(0%, 39%, 38%, 60.8%)
CIE-LAB	lab(30.39, 17.28, 6.59)
CIE-LCH	lch(30.39, 18.49, 20.87°)
OKLab	oklab(40.65% 0.0524 0.0171)
OKLCH	oklch(40.65% 0.055 18.1)
XYZ	xyz(7.7941, 6.3952, 5.3804)
Luminance	0.0640 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D3E #3D6463

analogous

#643D52 #643D3E #64503D

triadic

#643D3E #3E643D #3D3E64

tetradic

#643D3E #52643D #3D6463 #503D64

square

#643D3E #52643D #3D6463 #503D64

split-complementary

#643D3E #3D6450 #3D5264

monochromatic

#180F0F #3E2626 #643D3E #8A5456 #A97274

Accessibility & contrast

On white

9.21

#643D3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#643D3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D3E

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D3E	#FFFFFF	#000000	##FFFFFF
##643D3E	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#45433E

Deuteranopia (green-blind)

#4E4A3D

Tritanopia (blue-blind)

#6B393E

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643d3e;
/* rgb */ color: rgb(100, 61, 62);
/* oklch */ color: oklch(40.6% 0.055 18.1);

Tailwind

colors: {
  custom: {
    50: '#927373',
    500: '#643d3e',
    950: '#000000',
  },
}

SCSS

$custom: #643d3e;
$custom-light: #927373;
$custom-dark: #000000;

JSON

{
  "hex": "#643d3e",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 62
  },
  "hsl": {
    "h": 358.462,
    "s": 24.224,
    "l": 31.569
  },
  "oklch": {
    "l": 0.4065,
    "c": 0.05511,
    "h": 18.1
  },
  "luminance": 0.06395
}

Semantic roles & 50–950 ramp

primary

#643D3E

secondary

#699493

accent

#C1BE67

background

#F9F7F6

surface

#F1EDEC

border

#CBC8C7

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643D3E

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

Preview Lab → · Contrast checker → · Palette generator →