#643A44#643A44

#643A44 is a dark, moderate red. Relative luminance 0.062; OKLCH L 40.3% C 0.061 H 4.8°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#643A44
RGB	rgb(100, 58, 68)
HSL	hsl(346, 27%, 31%)
HSV	hsv(346, 42%, 39%)
CMYK	cmyk(0%, 42%, 32%, 60.8%)
CIE-LAB	lab(29.80, 20.00, 1.83)
CIE-LCH	lch(29.80, 20.08, 5.24°)
OKLab	oklab(40.25% 0.0606 0.0051)
OKLCH	oklch(40.25% 0.061 4.8)
XYZ	xyz(7.8122, 6.1534, 6.2440)
Luminance	0.0615 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A44 #3A645A

analogous

#643A59 #643A44 #64453A

triadic

#643A44 #44643A #3A4464

tetradic

#643A44 #59643A #3A645A #453A64

square

#643A44 #59643A #3A645A #453A64

split-complementary

#643A44 #3A6445 #3A5964

monochromatic

#170D0F #3D242A #643A44 #8B505E #AB6E7C

Accessibility & contrast

On white

9.41

#643A44 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#643A44 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A44

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A44	#FFFFFF	#000000	##FFFFFF
##643A44	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#414144

Deuteranopia (green-blind)

#4B4943

Tritanopia (blue-blind)

#6B373E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643a44;
/* rgb */ color: rgb(100, 58, 68);
/* oklch */ color: oklch(40.3% 0.061 4.8);

Tailwind

colors: {
  custom: {
    50: '#917177',
    500: '#643a44',
    950: '#000000',
  },
}

SCSS

$custom: #643a44;
$custom-light: #917177;
$custom-dark: #000000;

JSON

{
  "hex": "#643a44",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 68
  },
  "hsl": {
    "h": 345.714,
    "s": 26.582,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40253,
    "c": 0.06078,
    "h": 4.8
  },
  "luminance": 0.06153
}

Semantic roles & 50–950 ramp

primary

#643A44

secondary

#669489

accent

#C3AD65

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0708

muted

#7E7A7B

Preview Lab

Preview with #643A44

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

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