#643E33#643E33

#643E33 is a dark, muted red. Relative luminance 0.064; OKLCH L 40.6% C 0.057 H 36.9°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#643E33
RGB	rgb(100, 62, 51)
HSL	hsl(13, 32%, 30%)
HSV	hsv(13, 49%, 39%)
CMYK	cmyk(0%, 38%, 49%, 60.8%)
CIE-LAB	lab(30.39, 15.24, 13.68)
CIE-LCH	lch(30.39, 20.48, 41.90°)
OKLab	oklab(40.56% 0.0455 0.0341)
OKLCH	oklch(40.56% 0.057 36.9)
XYZ	xyz(7.5761, 6.3942, 3.9665)
Luminance	0.0639 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E33 #335964

analogous

#643341 #643E33 #645733

triadic

#643E33 #33643E #3E3364

tetradic

#643E33 #416433 #335964 #573364

square

#643E33 #416433 #335964 #573364

split-complementary

#643E33 #336457 #334164

monochromatic

#140D0A #3B251E #643E33 #8D5748 #AF7462

Accessibility & contrast

On white

9.22

#643E33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#643E33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E33

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E33	#FFFFFF	#000000	##FFFFFF
##643E33	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#474332

Deuteranopia (green-blind)

#504B33

Tritanopia (blue-blind)

#6C383B

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643e33;
/* rgb */ color: rgb(100, 62, 51);
/* oklch */ color: oklch(40.6% 0.057 36.9);

Tailwind

colors: {
  custom: {
    50: '#92736a',
    500: '#643e33',
    950: '#000000',
  },
}

SCSS

$custom: #643e33;
$custom-light: #92736a;
$custom-dark: #000000;

JSON

{
  "hex": "#643e33",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 51
  },
  "hsl": {
    "h": 13.469,
    "s": 32.45,
    "l": 29.608
  },
  "oklch": {
    "l": 0.40562,
    "c": 0.05686,
    "h": 36.9
  },
  "luminance": 0.06394
}

Semantic roles & 50–950 ramp

primary

#643E33

secondary

#5E8995

accent

#B1C95F

background

#F9F7F6

surface

#F1EDEB

border

#CBC8C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #643E33

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

Preview Lab → · Contrast checker → · Palette generator →