#643F45#643F45

#643F45 is a dark, muted red. Relative luminance 0.067; OKLCH L 41.3% C 0.052 H 9.0°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#643F45
RGB	rgb(100, 63, 69)
HSL	hsl(350, 23%, 32%)
HSV	hsv(350, 37%, 39%)
CMYK	cmyk(0%, 37%, 31%, 60.8%)
CIE-LAB	lab(31.10, 17.08, 3.07)
CIE-LCH	lch(31.10, 17.35, 10.18°)
OKLab	oklab(41.26% 0.0518 0.0082)
OKLCH	oklch(41.26% 0.052 9)
XYZ	xyz(8.1074, 6.6946, 6.4942)
Luminance	0.0669 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F45 #3F645E

analogous

#643F58 #643F45 #644C3F

triadic

#643F45 #45643F #3F4564

tetradic

#643F45 #58643F #3F645E #4C3F64

square

#643F45 #58643F #3F645E #4C3F64

split-complementary

#643F45 #3F644C #3F5864

monochromatic

#191011 #3E272B #643F45 #8A575F #A8757D

Accessibility & contrast

On white

8.98

#643F45 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#643F45 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F45

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F45	#FFFFFF	#000000	##FFFFFF
##643F45	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454545

Deuteranopia (green-blind)

#4E4C44

Tritanopia (blue-blind)

#6A3C41

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #643f45;
/* rgb */ color: rgb(100, 63, 69);
/* oklch */ color: oklch(41.3% 0.052 9.0);

Tailwind

colors: {
  custom: {
    50: '#917478',
    500: '#643f45',
    950: '#000000',
  },
}

SCSS

$custom: #643f45;
$custom-light: #917478;
$custom-dark: #000000;

JSON

{
  "hex": "#643f45",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 69
  },
  "hsl": {
    "h": 350.27,
    "s": 22.699,
    "l": 31.961
  },
  "oklch": {
    "l": 0.41261,
    "c": 0.05241,
    "h": 9
  },
  "luminance": 0.06694
}

Semantic roles & 50–950 ramp

primary

#643F45

secondary

#6B948D

accent

#BFB169

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0809

muted

#7E7B7B

Preview Lab

Preview with #643F45

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

Preview Lab → · Contrast checker → · Palette generator →