#643B43#643B43

#643B43 is a dark, muted red. Relative luminance 0.062; OKLCH L 40.4% C 0.059 H 7.4°. Best body text is #FFFFFF at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#643B43
RGB	rgb(100, 59, 67)
HSL	hsl(348, 26%, 31%)
HSV	hsv(348, 41%, 39%)
CMYK	cmyk(0%, 41%, 33%, 60.8%)
CIE-LAB	lab(30.02, 19.23, 2.81)
CIE-LCH	lch(30.02, 19.44, 8.30°)
OKLab	oklab(40.41% 0.0583 0.0076)
OKLCH	oklch(40.41% 0.059 7.4)
XYZ	xyz(7.8329, 6.2431, 6.1016)
Luminance	0.0624 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B43 #3B645C

analogous

#643B57 #643B43 #64473B

triadic

#643B43 #43643B #3B4364

tetradic

#643B43 #57643B #3B645C #473B64

square

#643B43 #57643B #3B645C #473B64

split-complementary

#643B43 #3B6447 #3B5764

monochromatic

#170E0F #3E2429 #643B43 #8A525D #AA6F7B

Accessibility & contrast

On white

9.34

#643B43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#643B43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B43

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B43	#FFFFFF	#000000	##FFFFFF
##643B43	1.00	9.34	2.25	9.34
#FFFFFF	9.34	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#424243

Deuteranopia (green-blind)

#4C4A42

Tritanopia (blue-blind)

#6B383E

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643b43;
/* rgb */ color: rgb(100, 59, 67);
/* oklch */ color: oklch(40.4% 0.059 7.4);

Tailwind

colors: {
  custom: {
    50: '#917177',
    500: '#643b43',
    950: '#000000',
  },
}

SCSS

$custom: #643b43;
$custom-light: #917177;
$custom-dark: #000000;

JSON

{
  "hex": "#643b43",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 67
  },
  "hsl": {
    "h": 348.293,
    "s": 25.786,
    "l": 31.176
  },
  "oklch": {
    "l": 0.40413,
    "c": 0.05878,
    "h": 7.4
  },
  "luminance": 0.06243
}

Semantic roles & 50–950 ramp

primary

#643B43

secondary

#67948B

accent

#C2B066

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643B43

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

Preview Lab → · Contrast checker → · Palette generator →