#643D33#643D33

#643D33 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.4% C 0.058 H 35.1°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#643D33
RGB	rgb(100, 61, 51)
HSL	hsl(12, 32%, 30%)
HSV	hsv(12, 49%, 39%)
CMYK	cmyk(0%, 39%, 49%, 60.8%)
CIE-LAB	lab(30.12, 15.86, 13.32)
CIE-LCH	lch(30.12, 20.71, 40.03°)
OKLab	oklab(40.36% 0.0474 0.0333)
OKLCH	oklch(40.36% 0.058 35.1)
XYZ	xyz(7.5222, 6.2865, 3.9486)
Luminance	0.0629 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D33 #335A64

analogous

#643342 #643D33 #645633

triadic

#643D33 #33643D #3D3364

tetradic

#643D33 #426433 #335A64 #563364

square

#643D33 #426433 #335A64 #563364

split-complementary

#643D33 #336456 #334264

monochromatic

#140C0A #3B241E #643D33 #8D5648 #AF7262

Accessibility & contrast

On white

9.30

#643D33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#643D33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D33

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D33	#FFFFFF	#000000	##FFFFFF
##643D33	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#464232

Deuteranopia (green-blind)

#504A33

Tritanopia (blue-blind)

#6C373A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643d33;
/* rgb */ color: rgb(100, 61, 51);
/* oklch */ color: oklch(40.4% 0.058 35.1);

Tailwind

colors: {
  custom: {
    50: '#92736a',
    500: '#643d33',
    950: '#000000',
  },
}

SCSS

$custom: #643d33;
$custom-light: #92736a;
$custom-dark: #000000;

JSON

{
  "hex": "#643d33",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 51
  },
  "hsl": {
    "h": 12.245,
    "s": 32.45,
    "l": 29.608
  },
  "oklch": {
    "l": 0.4036,
    "c": 0.0579,
    "h": 35.1
  },
  "luminance": 0.06286
}

Semantic roles & 50–950 ramp

primary

#643D33

secondary

#5E8A95

accent

#B3C95F

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #643D33

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

Preview Lab → · Contrast checker → · Palette generator →