#643E42#643E42

#643E42 is a dark, muted red. Relative luminance 0.065; OKLCH L 41.0% C 0.054 H 12.8°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#643E42
RGB	rgb(100, 62, 66)
HSL	hsl(354, 23%, 32%)
HSV	hsv(354, 38%, 39%)
CMYK	cmyk(0%, 38%, 34%, 60.8%)
CIE-LAB	lab(30.76, 17.24, 4.52)
CIE-LCH	lch(30.76, 17.82, 14.68°)
OKLab	oklab(40.97% 0.0523 0.0119)
OKLCH	oklch(40.97% 0.054 12.8)
XYZ	xyz(7.9618, 6.5485, 5.9978)
Luminance	0.0655 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E42 #3E6460

analogous

#643E55 #643E42 #644D3E

triadic

#643E42 #42643E #3E4264

tetradic

#643E42 #55643E #3E6460 #4D3E64

square

#643E42 #55643E #3E6460 #4D3E64

split-complementary

#643E42 #3E644D #3E5564

monochromatic

#180F10 #3E2729 #643E42 #8A555B #A97479

Accessibility & contrast

On white

9.09

#643E42 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#643E42 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E42

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E42	#FFFFFF	#000000	##FFFFFF
##643E42	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454442

Deuteranopia (green-blind)

#4E4B41

Tritanopia (blue-blind)

#6B3A3F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643e42;
/* rgb */ color: rgb(100, 62, 66);
/* oklch */ color: oklch(41.0% 0.054 12.8);

Tailwind

colors: {
  custom: {
    50: '#917376',
    500: '#643e42',
    950: '#000000',
  },
}

SCSS

$custom: #643e42;
$custom-light: #917376;
$custom-dark: #000000;

JSON

{
  "hex": "#643e42",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 66
  },
  "hsl": {
    "h": 353.684,
    "s": 23.457,
    "l": 31.765
  },
  "oklch": {
    "l": 0.40968,
    "c": 0.05364,
    "h": 12.8
  },
  "luminance": 0.06548
}

Semantic roles & 50–950 ramp

primary

#643E42

secondary

#6A948F

accent

#C0B768

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643E42

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

Preview Lab → · Contrast checker → · Palette generator →