#643E43#643E43

#643E43 is a dark, muted red. Relative luminance 0.066; OKLCH L 41.0% C 0.054 H 11.1°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#643E43
RGB	rgb(100, 62, 67)
HSL	hsl(352, 23%, 32%)
HSV	hsv(352, 38%, 39%)
CMYK	cmyk(0%, 38%, 33%, 60.8%)
CIE-LAB	lab(30.78, 17.39, 3.91)
CIE-LCH	lch(30.78, 17.82, 12.67°)
OKLab	oklab(41% 0.0527 0.0104)
OKLCH	oklch(41% 0.054 11.1)
XYZ	xyz(7.9915, 6.5604, 6.1545)
Luminance	0.0656 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E43 #3E645F

analogous

#643E56 #643E43 #644C3E

triadic

#643E43 #43643E #3E4364

tetradic

#643E43 #56643E #3E645F #4C3E64

square

#643E43 #56643E #3E645F #4C3E64

split-complementary

#643E43 #3E644C #3E5664

monochromatic

#180F10 #3E272A #643E43 #8A555C #A9747B

Accessibility & contrast

On white

9.08

#643E43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#643E43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E43

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E43	#FFFFFF	#000000	##FFFFFF
##643E43	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444443

Deuteranopia (green-blind)

#4E4B42

Tritanopia (blue-blind)

#6B3B40

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643e43;
/* rgb */ color: rgb(100, 62, 67);
/* oklch */ color: oklch(41.0% 0.054 11.1);

Tailwind

colors: {
  custom: {
    50: '#917477',
    500: '#643e43',
    950: '#000000',
  },
}

SCSS

$custom: #643e43;
$custom-light: #917477;
$custom-dark: #000000;

JSON

{
  "hex": "#643e43",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 67
  },
  "hsl": {
    "h": 352.105,
    "s": 23.457,
    "l": 31.765
  },
  "oklch": {
    "l": 0.40999,
    "c": 0.05375,
    "h": 11.1
  },
  "luminance": 0.0656
}

Semantic roles & 50–950 ramp

primary

#643E43

secondary

#6A948E

accent

#C0B468

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643E43

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

Preview Lab → · Contrast checker → · Palette generator →