#643C36#643C36

#643C36 is a dark, muted red. Relative luminance 0.062; OKLCH L 40.2% C 0.058 H 29.1°. Best body text is #FFFFFF at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#643C36
RGB	rgb(100, 60, 54)
HSL	hsl(8, 30%, 30%)
HSV	hsv(8, 46%, 39%)
CMYK	cmyk(0%, 40%, 46%, 60.8%)
CIE-LAB	lab(29.93, 16.84, 11.13)
CIE-LCH	lch(29.93, 20.19, 33.47°)
OKLab	oklab(40.23% 0.0506 0.0282)
OKLCH	oklch(40.23% 0.058 29.1)
XYZ	xyz(7.5376, 6.2080, 4.2906)
Luminance	0.0621 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C36 #365E64

analogous

#643647 #643C36 #645336

triadic

#643C36 #36643C #3C3664

tetradic

#643C36 #476436 #365E64 #533664

square

#643C36 #476436 #365E64 #533664

split-complementary

#643C36 #366453 #364764

monochromatic

#150C0B #3C2421 #643C36 #8C544B #AD7067

Accessibility & contrast

On white

9.37

#643C36 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#643C36 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C36

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C36	#FFFFFF	#000000	##FFFFFF
##643C36	1.00	9.37	2.24	9.37
#FFFFFF	9.37	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454235

Deuteranopia (green-blind)

#4F4A35

Tritanopia (blue-blind)

#6C363B

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643c36;
/* rgb */ color: rgb(100, 60, 54);
/* oklch */ color: oklch(40.2% 0.058 29.1);

Tailwind

colors: {
  custom: {
    50: '#92726d',
    500: '#643c36',
    950: '#000000',
  },
}

SCSS

$custom: #643c36;
$custom-light: #92726d;
$custom-dark: #000000;

JSON

{
  "hex": "#643c36",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 54
  },
  "hsl": {
    "h": 7.826,
    "s": 29.87,
    "l": 30.196
  },
  "oklch": {
    "l": 0.40234,
    "c": 0.05792,
    "h": 29.1
  },
  "luminance": 0.06207
}

Semantic roles & 50–950 ramp

primary

#643C36

secondary

#618E95

accent

#B9C662

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #643C36

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

Preview Lab → · Contrast checker → · Palette generator →