#643F41#643F41

#643F41 is a dark, muted red. Relative luminance 0.066; OKLCH L 41.1% C 0.052 H 16.0°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#643F41
RGB	rgb(100, 63, 65)
HSL	hsl(357, 23%, 32%)
HSV	hsv(357, 37%, 39%)
CMYK	cmyk(0%, 37%, 35%, 60.8%)
CIE-LAB	lab(30.99, 16.47, 5.49)
CIE-LCH	lch(30.99, 17.36, 18.45°)
OKLab	oklab(41.14% 0.05 0.0144)
OKLCH	oklch(41.14% 0.052 16)
XYZ	xyz(7.9874, 6.6466, 5.8622)
Luminance	0.0665 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F41 #3F6462

analogous

#643F54 #643F41 #64503F

triadic

#643F41 #41643F #3F4164

tetradic

#643F41 #54643F #3F6462 #503F64

square

#643F41 #54643F #3F6462 #503F64

split-complementary

#643F41 #3F6450 #3F5464

monochromatic

#191010 #3E2729 #643F41 #8A5759 #A87578

Accessibility & contrast

On white

9.02

#643F41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#643F41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F41

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F41	#FFFFFF	#000000	##FFFFFF
##643F41	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#464541

Deuteranopia (green-blind)

#4F4C40

Tritanopia (blue-blind)

#6B3B40

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #643f41;
/* rgb */ color: rgb(100, 63, 65);
/* oklch */ color: oklch(41.1% 0.052 16.0);

Tailwind

colors: {
  custom: {
    50: '#917475',
    500: '#643f41',
    950: '#000000',
  },
}

SCSS

$custom: #643f41;
$custom-light: #917475;
$custom-dark: #000000;

JSON

{
  "hex": "#643f41",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 65
  },
  "hsl": {
    "h": 356.757,
    "s": 22.699,
    "l": 31.961
  },
  "oklch": {
    "l": 0.41137,
    "c": 0.05203,
    "h": 16
  },
  "luminance": 0.06646
}

Semantic roles & 50–950 ramp

primary

#643F41

secondary

#6B9491

accent

#BFBB69

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643F41

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

Preview Lab → · Contrast checker → · Palette generator →