#643F43#643F43

#643F43 is a dark, muted red. Relative luminance 0.067; OKLCH L 41.2% C 0.052 H 12.5°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#643F43
RGB	rgb(100, 63, 67)
HSL	hsl(354, 23%, 32%)
HSV	hsv(354, 37%, 39%)
CMYK	cmyk(0%, 37%, 33%, 60.8%)
CIE-LAB	lab(31.04, 16.77, 4.28)
CIE-LCH	lch(31.04, 17.31, 14.31°)
OKLab	oklab(41.2% 0.0509 0.0113)
OKLCH	oklch(41.2% 0.052 12.5)
XYZ	xyz(8.0464, 6.6701, 6.1728)
Luminance	0.0667 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F43 #3F6460

analogous

#643F56 #643F43 #644E3F

triadic

#643F43 #43643F #3F4364

tetradic

#643F43 #56643F #3F6460 #4E3F64

square

#643F43 #56643F #3F6460 #4E3F64

split-complementary

#643F43 #3F644E #3F5664

monochromatic

#191011 #3E272A #643F43 #8A575C #A8757B

Accessibility & contrast

On white

9.00

#643F43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#643F43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F43

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F43	#FFFFFF	#000000	##FFFFFF
##643F43	1.00	9.00	2.33	9.00
#FFFFFF	9.00	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454543

Deuteranopia (green-blind)

#4E4C42

Tritanopia (blue-blind)

#6B3C40

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #643f43;
/* rgb */ color: rgb(100, 63, 67);
/* oklch */ color: oklch(41.2% 0.052 12.5);

Tailwind

colors: {
  custom: {
    50: '#917477',
    500: '#643f43',
    950: '#000000',
  },
}

SCSS

$custom: #643f43;
$custom-light: #917477;
$custom-dark: #000000;

JSON

{
  "hex": "#643f43",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 67
  },
  "hsl": {
    "h": 353.514,
    "s": 22.699,
    "l": 31.961
  },
  "oklch": {
    "l": 0.41198,
    "c": 0.05212,
    "h": 12.5
  },
  "luminance": 0.0667
}

Semantic roles & 50–950 ramp

primary

#643F43

secondary

#6B948F

accent

#BFB669

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643F43

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

Preview Lab → · Contrast checker → · Palette generator →