#643D39#643D39

#643D39 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.5% C 0.056 H 26.2°. Best body text is #FFFFFF at 9.26:1 contrast (WCAG AA passes).

Color values

HEX	#643D39
RGB	rgb(100, 61, 57)
HSL	hsl(6, 27%, 31%)
HSV	hsv(6, 43%, 39%)
CMYK	cmyk(0%, 39%, 43%, 60.8%)
CIE-LAB	lab(30.26, 16.60, 9.65)
CIE-LCH	lch(30.26, 19.20, 30.17°)
OKLab	oklab(40.51% 0.0501 0.0246)
OKLCH	oklch(40.51% 0.056 26.2)
XYZ	xyz(7.6631, 6.3428, 4.6908)
Luminance	0.0634 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D39 #396064

analogous

#64394A #643D39 #645239

triadic

#643D39 #39643D #3D3964

tetradic

#643D39 #4A6439 #396064 #523964

square

#643D39 #4A6439 #396064 #523964

split-complementary

#643D39 #396452 #394A64

monochromatic

#160D0D #3D2523 #643D39 #8B554F #AB726C

Accessibility & contrast

On white

9.26

#643D39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#643D39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D39

9.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D39	#FFFFFF	#000000	##FFFFFF
##643D39	1.00	9.26	2.27	9.26
#FFFFFF	9.26	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454339

Deuteranopia (green-blind)

#4F4A38

Tritanopia (blue-blind)

#6C383C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643d39;
/* rgb */ color: rgb(100, 61, 57);
/* oklch */ color: oklch(40.5% 0.056 26.2);

Tailwind

colors: {
  custom: {
    50: '#92736f',
    500: '#643d39',
    950: '#000000',
  },
}

SCSS

$custom: #643d39;
$custom-light: #92736f;
$custom-dark: #000000;

JSON

{
  "hex": "#643d39",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 57
  },
  "hsl": {
    "h": 5.581,
    "s": 27.389,
    "l": 30.784
  },
  "oklch": {
    "l": 0.40511,
    "c": 0.05583,
    "h": 26.2
  },
  "luminance": 0.06342
}

Semantic roles & 50–950 ramp

primary

#643D39

secondary

#659094

accent

#BBC464

background

#F9F6F6

surface

#F1ECEC

border

#CBC7C7

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #643D39

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

Preview Lab → · Contrast checker → · Palette generator →