#643B44#643B44

#643B44 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.4% C 0.059 H 5.8°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#643B44
RGB	rgb(100, 59, 68)
HSL	hsl(347, 26%, 31%)
HSV	hsv(347, 41%, 39%)
CMYK	cmyk(0%, 41%, 32%, 60.8%)
CIE-LAB	lab(30.05, 19.39, 2.20)
CIE-LCH	lch(30.05, 19.51, 6.47°)
OKLab	oklab(40.45% 0.0587 0.006)
OKLCH	oklch(40.45% 0.059 5.8)
XYZ	xyz(7.8631, 6.2552, 6.2609)
Luminance	0.0625 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B44 #3B645B

analogous

#643B58 #643B44 #64463B

triadic

#643B44 #44643B #3B4464

tetradic

#643B44 #58643B #3B645B #463B64

square

#643B44 #58643B #3B645B #463B64

split-complementary

#643B44 #3B6446 #3B5864

monochromatic

#170E10 #3E242A #643B44 #8A525E #AA6F7C

Accessibility & contrast

On white

9.33

#643B44 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#643B44 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B44

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B44	#FFFFFF	#000000	##FFFFFF
##643B44	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#414244

Deuteranopia (green-blind)

#4B4A43

Tritanopia (blue-blind)

#6B383E

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643b44;
/* rgb */ color: rgb(100, 59, 68);
/* oklch */ color: oklch(40.4% 0.059 5.8);

Tailwind

colors: {
  custom: {
    50: '#917177',
    500: '#643b44',
    950: '#000000',
  },
}

SCSS

$custom: #643b44;
$custom-light: #917177;
$custom-dark: #000000;

JSON

{
  "hex": "#643b44",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 68
  },
  "hsl": {
    "h": 346.829,
    "s": 25.786,
    "l": 31.176
  },
  "oklch": {
    "l": 0.40445,
    "c": 0.05902,
    "h": 5.8
  },
  "luminance": 0.06255
}

Semantic roles & 50–950 ramp

primary

#643B44

secondary

#67948A

accent

#C2AE66

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643B44

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

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