#643F66#643F66

#643F66 is a dark, moderate purple. Relative luminance 0.072; OKLCH L 42.6% C 0.078 H 325.0°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#643F66
RGB	rgb(100, 63, 102)
HSL	hsl(297, 24%, 32%)
HSV	hsv(297, 38%, 40%)
CMYK	cmyk(2%, 38.2%, 0%, 60%)
CIE-LAB	lab(32.31, 23.24, -16.35)
CIE-LCH	lch(32.31, 28.41, 324.88°)
OKLab	oklab(42.58% 0.0637 -0.0445)
OKLCH	oklch(42.58% 0.078 325)
XYZ	xyz(9.4311, 7.2240, 13.4654)
Luminance	0.0722 (WCAG relative)
Temperature	neutral
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F66 #41663F

analogous

#513F66 #643F66 #663F55

triadic

#643F66 #66643F #3F6664

tetradic

#643F66 #66513F #41663F #3F5566

square

#643F66 #66513F #41663F #3F5566

split-complementary

#643F66 #55663F #3F6651

monochromatic

#1A101A #3F2840 #643F66 #89568C #A775AA

Accessibility & contrast

On white

8.59

#643F66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#643F66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F66

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F66	#FFFFFF	#000000	##FFFFFF
##643F66	1.00	8.59	2.44	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C4967

Deuteranopia (green-blind)

#454E65

Tritanopia (blue-blind)

#66434E

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643f66;
/* rgb */ color: rgb(100, 63, 102);
/* oklch */ color: oklch(42.6% 0.078 325.0);

Tailwind

colors: {
  custom: {
    50: '#917591',
    500: '#643f66',
    950: '#000000',
  },
}

SCSS

$custom: #643f66;
$custom-light: #917591;
$custom-dark: #000000;

JSON

{
  "hex": "#643f66",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 102
  },
  "hsl": {
    "h": 296.923,
    "s": 23.636,
    "l": 32.353
  },
  "oklch": {
    "l": 0.4258,
    "c": 0.07774,
    "h": 325
  },
  "luminance": 0.07224
}

Semantic roles & 50–950 ramp

primary

#643F66

secondary

#6E956B

accent

#C0686C

background

#F8F7F8

surface

#F0EDF0

border

#CBC8CB

text

#0D080D

muted

#7D7B7D

Preview Lab

Preview with #643F66

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

Preview Lab → · Contrast checker → · Palette generator →