#643A3E#643A3E

#643A3E is a dark, muted red. Relative luminance 0.061; OKLCH L 40.1% C 0.060 H 14.0°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#643A3E
RGB	rgb(100, 58, 62)
HSL	hsl(354, 27%, 31%)
HSV	hsv(354, 42%, 39%)
CMYK	cmyk(0%, 42%, 38%, 60.8%)
CIE-LAB	lab(29.62, 19.12, 5.50)
CIE-LCH	lch(29.62, 19.90, 16.06°)
OKLab	oklab(40.06% 0.058 0.0144)
OKLCH	oklch(40.06% 0.06 14)
XYZ	xyz(7.6384, 6.0838, 5.3285)
Luminance	0.0608 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A3E #3A6460

analogous

#643A53 #643A3E #644B3A

triadic

#643A3E #3E643A #3A3E64

tetradic

#643A3E #53643A #3A6460 #4B3A64

square

#643A3E #53643A #3A6460 #4B3A64

split-complementary

#643A3E #3A644B #3A5364

monochromatic

#170D0E #3D2426 #643A3E #8B5056 #AB6E73

Accessibility & contrast

On white

9.47

#643A3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#643A3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A3E

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A3E	#FFFFFF	#000000	##FFFFFF
##643A3E	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#42413E

Deuteranopia (green-blind)

#4C493D

Tritanopia (blue-blind)

#6B363C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643a3e;
/* rgb */ color: rgb(100, 58, 62);
/* oklch */ color: oklch(40.1% 0.060 14.0);

Tailwind

colors: {
  custom: {
    50: '#927173',
    500: '#643a3e',
    950: '#000000',
  },
}

SCSS

$custom: #643a3e;
$custom-light: #927173;
$custom-dark: #000000;

JSON

{
  "hex": "#643a3e",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 62
  },
  "hsl": {
    "h": 354.286,
    "s": 26.582,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40064,
    "c": 0.05972,
    "h": 14
  },
  "luminance": 0.06083
}

Semantic roles & 50–950 ramp

primary

#643A3E

secondary

#669490

accent

#C3BA65

background

#F9F6F6

surface

#F1ECEC

border

#CBC7C7

text

#0D0708

muted

#7E7A7B

Preview Lab

Preview with #643A3E

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

Preview Lab → · Contrast checker → · Palette generator →