#643B41#643B41

#643B41 is a dark, muted red. Relative luminance 0.062; OKLCH L 40.3% C 0.058 H 10.5°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#643B41
RGB	rgb(100, 59, 65)
HSL	hsl(351, 26%, 31%)
HSV	hsv(351, 41%, 39%)
CMYK	cmyk(0%, 41%, 35%, 60.8%)
CIE-LAB	lab(29.96, 18.94, 4.03)
CIE-LCH	lch(29.96, 19.36, 12.01°)
OKLab	oklab(40.35% 0.0574 0.0107)
OKLCH	oklch(40.35% 0.058 10.5)
XYZ	xyz(7.7739, 6.2195, 5.7910)
Luminance	0.0622 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B41 #3B645E

analogous

#643B55 #643B41 #64493B

triadic

#643B41 #41643B #3B4164

tetradic

#643B41 #55643B #3B645E #493B64

square

#643B41 #55643B #3B645E #493B64

split-complementary

#643B41 #3B6449 #3B5564

monochromatic

#170E0F #3E2428 #643B41 #8A525A #AA6F78

Accessibility & contrast

On white

9.36

#643B41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#643B41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B41

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B41	#FFFFFF	#000000	##FFFFFF
##643B41	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#424241

Deuteranopia (green-blind)

#4C4A40

Tritanopia (blue-blind)

#6B373D

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643b41;
/* rgb */ color: rgb(100, 59, 65);
/* oklch */ color: oklch(40.3% 0.058 10.5);

Tailwind

colors: {
  custom: {
    50: '#927175',
    500: '#643b41',
    950: '#000000',
  },
}

SCSS

$custom: #643b41;
$custom-light: #927175;
$custom-dark: #000000;

JSON

{
  "hex": "#643b41",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 65
  },
  "hsl": {
    "h": 351.22,
    "s": 25.786,
    "l": 31.176
  },
  "oklch": {
    "l": 0.40349,
    "c": 0.05841,
    "h": 10.5
  },
  "luminance": 0.06219
}

Semantic roles & 50–950 ramp

primary

#643B41

secondary

#67948D

accent

#C2B566

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643B41

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

Preview Lab → · Contrast checker → · Palette generator →