#643B36#643B36

#643B36 is a dark, muted red. Relative luminance 0.061; OKLCH L 40.0% C 0.059 H 27.5°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#643B36
RGB	rgb(100, 59, 54)
HSL	hsl(7, 30%, 30%)
HSV	hsv(7, 46%, 39%)
CMYK	cmyk(0%, 41%, 46%, 60.8%)
CIE-LAB	lab(29.67, 17.45, 10.78)
CIE-LCH	lch(29.67, 20.51, 31.71°)
OKLab	oklab(40.04% 0.0525 0.0273)
OKLCH	oklch(40.04% 0.059 27.5)
XYZ	xyz(7.4857, 6.1042, 4.2733)
Luminance	0.0610 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B36 #365F64

analogous

#643648 #643B36 #645236

triadic

#643B36 #36643B #3B3664

tetradic

#643B36 #486436 #365F64 #523664

square

#643B36 #486436 #365F64 #523664

split-complementary

#643B36 #366452 #364864

monochromatic

#150C0B #3C2421 #643B36 #8C524B #AD6F67

Accessibility & contrast

On white

9.46

#643B36 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#643B36 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B36

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B36	#FFFFFF	#000000	##FFFFFF
##643B36	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444135

Deuteranopia (green-blind)

#4E4935

Tritanopia (blue-blind)

#6C353A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643b36;
/* rgb */ color: rgb(100, 59, 54);
/* oklch */ color: oklch(40.0% 0.059 27.5);

Tailwind

colors: {
  custom: {
    50: '#92716d',
    500: '#643b36',
    950: '#000000',
  },
}

SCSS

$custom: #643b36;
$custom-light: #92716d;
$custom-dark: #000000;

JSON

{
  "hex": "#643b36",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 54
  },
  "hsl": {
    "h": 6.522,
    "s": 29.87,
    "l": 30.196
  },
  "oklch": {
    "l": 0.40037,
    "c": 0.05916,
    "h": 27.5
  },
  "luminance": 0.06104
}

Semantic roles & 50–950 ramp

primary

#643B36

secondary

#618F95

accent

#BBC662

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0707

muted

#7E7A7A

Preview Lab

Preview with #643B36

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

Preview Lab → · Contrast checker → · Palette generator →