#643A3F#643A3F

#643A3F is a dark, muted red. Relative luminance 0.061; OKLCH L 40.1% C 0.060 H 12.4°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#643A3F
RGB	rgb(100, 58, 63)
HSL	hsl(353, 27%, 31%)
HSV	hsv(353, 42%, 39%)
CMYK	cmyk(0%, 42%, 37%, 60.8%)
CIE-LAB	lab(29.65, 19.26, 4.89)
CIE-LCH	lch(29.65, 19.87, 14.25°)
OKLab	oklab(40.1% 0.0584 0.0129)
OKLCH	oklch(40.1% 0.06 12.4)
XYZ	xyz(7.6661, 6.0949, 5.4743)
Luminance	0.0609 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A3F #3A645F

analogous

#643A54 #643A3F #644A3A

triadic

#643A3F #3F643A #3A3F64

tetradic

#643A3F #54643A #3A645F #4A3A64

square

#643A3F #54643A #3A645F #4A3A64

split-complementary

#643A3F #3A644A #3A5464

monochromatic

#170D0E #3D2427 #643A3F #8B5057 #AB6E75

Accessibility & contrast

On white

9.46

#643A3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#643A3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A3F

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A3F	#FFFFFF	#000000	##FFFFFF
##643A3F	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#42413F

Deuteranopia (green-blind)

#4C493E

Tritanopia (blue-blind)

#6B363C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643a3f;
/* rgb */ color: rgb(100, 58, 63);
/* oklch */ color: oklch(40.1% 0.060 12.4);

Tailwind

colors: {
  custom: {
    50: '#927174',
    500: '#643a3f',
    950: '#000000',
  },
}

SCSS

$custom: #643a3f;
$custom-light: #927174;
$custom-dark: #000000;

JSON

{
  "hex": "#643a3f",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 63
  },
  "hsl": {
    "h": 352.857,
    "s": 26.582,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40095,
    "c": 0.0598,
    "h": 12.4
  },
  "luminance": 0.06094
}

Semantic roles & 50–950 ramp

primary

#643A3F

secondary

#66948F

accent

#C3B865

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0708

muted

#7E7A7B

Preview Lab

Preview with #643A3F

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

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