#643D43#643D43

#643D43 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.8% C 0.055 H 9.8°. Best body text is #FFFFFF at 9.17:1 contrast (WCAG AA passes).

Color values

HEX	#643D43
RGB	rgb(100, 61, 67)
HSL	hsl(351, 24%, 32%)
HSV	hsv(351, 39%, 39%)
CMYK	cmyk(0%, 39%, 33%, 60.8%)
CIE-LAB	lab(30.53, 18.00, 3.54)
CIE-LCH	lch(30.53, 18.35, 11.12°)
OKLab	oklab(40.8% 0.0546 0.0094)
OKLCH	oklch(40.8% 0.055 9.8)
XYZ	xyz(7.9376, 6.4526, 6.1365)
Luminance	0.0645 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D43 #3D645E

analogous

#643D57 #643D43 #644B3D

triadic

#643D43 #43643D #3D4364

tetradic

#643D43 #57643D #3D645E #4B3D64

square

#643D43 #57643D #3D645E #4B3D64

split-complementary

#643D43 #3D644B #3D5764

monochromatic

#180F10 #3E262A #643D43 #8A545C #A9727B

Accessibility & contrast

On white

9.17

#643D43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#643D43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D43

9.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D43	#FFFFFF	#000000	##FFFFFF
##643D43	1.00	9.17	2.29	9.17
#FFFFFF	9.17	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444343

Deuteranopia (green-blind)

#4D4B42

Tritanopia (blue-blind)

#6B3A3F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643d43;
/* rgb */ color: rgb(100, 61, 67);
/* oklch */ color: oklch(40.8% 0.055 9.8);

Tailwind

colors: {
  custom: {
    50: '#917377',
    500: '#643d43',
    950: '#000000',
  },
}

SCSS

$custom: #643d43;
$custom-light: #917377;
$custom-dark: #000000;

JSON

{
  "hex": "#643d43",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 67
  },
  "hsl": {
    "h": 350.769,
    "s": 24.224,
    "l": 31.569
  },
  "oklch": {
    "l": 0.40802,
    "c": 0.0554,
    "h": 9.8
  },
  "luminance": 0.06452
}

Semantic roles & 50–950 ramp

primary

#643D43

secondary

#69948D

accent

#C1B367

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643D43

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

Preview Lab → · Contrast checker → · Palette generator →