#643D44#643D44

#643D44 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.8% C 0.056 H 8.1°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#643D44
RGB	rgb(100, 61, 68)
HSL	hsl(349, 24%, 32%)
HSV	hsv(349, 39%, 39%)
CMYK	cmyk(0%, 39%, 32%, 60.8%)
CIE-LAB	lab(30.56, 18.16, 2.93)
CIE-LCH	lch(30.56, 18.39, 9.17°)
OKLab	oklab(40.83% 0.055 0.0079)
OKLCH	oklch(40.83% 0.056 8.1)
XYZ	xyz(7.9679, 6.4647, 6.2959)
Luminance	0.0646 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D44 #3D645D

analogous

#643D58 #643D44 #644A3D

triadic

#643D44 #44643D #3D4464

tetradic

#643D44 #58643D #3D645D #4A3D64

square

#643D44 #58643D #3D645D #4A3D64

split-complementary

#643D44 #3D644A #3D5864

monochromatic

#180F10 #3E262A #643D44 #8A545E #A9727C

Accessibility & contrast

On white

9.16

#643D44 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#643D44 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D44

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D44	#FFFFFF	#000000	##FFFFFF
##643D44	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#434444

Deuteranopia (green-blind)

#4D4B43

Tritanopia (blue-blind)

#6B3A3F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643d44;
/* rgb */ color: rgb(100, 61, 68);
/* oklch */ color: oklch(40.8% 0.056 8.1);

Tailwind

colors: {
  custom: {
    50: '#917377',
    500: '#643d44',
    950: '#000000',
  },
}

SCSS

$custom: #643d44;
$custom-light: #917377;
$custom-dark: #000000;

JSON

{
  "hex": "#643d44",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 68
  },
  "hsl": {
    "h": 349.231,
    "s": 24.224,
    "l": 31.569
  },
  "oklch": {
    "l": 0.40834,
    "c": 0.05559,
    "h": 8.1
  },
  "luminance": 0.06464
}

Semantic roles & 50–950 ramp

primary

#643D44

secondary

#69948C

accent

#C1B167

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643D44

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

Preview Lab → · Contrast checker → · Palette generator →