#643C33#643C33

#643C33 is a dark, muted red. Relative luminance 0.062; OKLCH L 40.2% C 0.059 H 33.4°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#643C33
RGB	rgb(100, 60, 51)
HSL	hsl(11, 32%, 30%)
HSV	hsv(11, 49%, 39%)
CMYK	cmyk(0%, 40%, 49%, 60.8%)
CIE-LAB	lab(29.86, 16.48, 12.97)
CIE-LCH	lch(29.86, 20.97, 38.22°)
OKLab	oklab(40.16% 0.0492 0.0325)
OKLCH	oklch(40.16% 0.059 33.4)
XYZ	xyz(7.4693, 6.1807, 3.9309)
Luminance	0.0618 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C33 #335B64

analogous

#643343 #643C33 #645533

triadic

#643C33 #33643C #3C3364

tetradic

#643C33 #436433 #335B64 #553364

square

#643C33 #436433 #335B64 #553364

split-complementary

#643C33 #336455 #334364

monochromatic

#140C0A #3B241E #643C33 #8D5448 #AF7062

Accessibility & contrast

On white

9.39

#643C33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#643C33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C33

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C33	#FFFFFF	#000000	##FFFFFF
##643C33	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454132

Deuteranopia (green-blind)

#4F4A33

Tritanopia (blue-blind)

#6C363A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643c33;
/* rgb */ color: rgb(100, 60, 51);
/* oklch */ color: oklch(40.2% 0.059 33.4);

Tailwind

colors: {
  custom: {
    50: '#92726a',
    500: '#643c33',
    950: '#000000',
  },
}

SCSS

$custom: #643c33;
$custom-light: #92726a;
$custom-dark: #000000;

JSON

{
  "hex": "#643c33",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 51
  },
  "hsl": {
    "h": 11.02,
    "s": 32.45,
    "l": 29.608
  },
  "oklch": {
    "l": 0.4016,
    "c": 0.05897,
    "h": 33.4
  },
  "luminance": 0.0618
}

Semantic roles & 50–950 ramp

primary

#643C33

secondary

#5E8B95

accent

#B5C95F

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #643C33

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

Preview Lab → · Contrast checker → · Palette generator →