#643D66#643D66

#643D66 is a dark, moderate purple. Relative luminance 0.070; OKLCH L 42.2% C 0.082 H 325.2°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#643D66
RGB	rgb(100, 61, 102)
HSL	hsl(297, 25%, 32%)
HSV	hsv(297, 40%, 40%)
CMYK	cmyk(2%, 40.2%, 0%, 60%)
CIE-LAB	lab(31.82, 24.46, -17.10)
CIE-LCH	lch(31.82, 29.84, 325.04°)
OKLab	oklab(42.21% 0.0671 -0.0467)
OKLCH	oklch(42.21% 0.082 325.2)
XYZ	xyz(9.3223, 7.0065, 13.4291)
Luminance	0.0701 (WCAG relative)
Temperature	neutral
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D66 #3F663D

analogous

#503D66 #643D66 #663D54

triadic

#643D66 #66643D #3D6664

tetradic

#643D66 #66503D #3F663D #3D5466

square

#643D66 #66503D #3F663D #3D5466

split-complementary

#643D66 #54663D #3D6650

monochromatic

#190F19 #3E2640 #643D66 #8A548C #A872AB

Accessibility & contrast

On white

8.75

#643D66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#643D66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D66

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D66	#FFFFFF	#000000	##FFFFFF
##643D66	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#394868

Deuteranopia (green-blind)

#434D65

Tritanopia (blue-blind)

#66414D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #643d66;
/* rgb */ color: rgb(100, 61, 102);
/* oklch */ color: oklch(42.2% 0.082 325.2);

Tailwind

colors: {
  custom: {
    50: '#917391',
    500: '#643d66',
    950: '#000000',
  },
}

SCSS

$custom: #643d66;
$custom-light: #917391;
$custom-dark: #000000;

JSON

{
  "hex": "#643d66",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 102
  },
  "hsl": {
    "h": 297.073,
    "s": 25.153,
    "l": 31.961
  },
  "oklch": {
    "l": 0.42211,
    "c": 0.08174,
    "h": 325.2
  },
  "luminance": 0.07006
}

Semantic roles & 50–950 ramp

primary

#643D66

secondary

#6B9669

accent

#C2666B

background

#F9F7F8

surface

#F1EDF0

border

#CBC8CB

text

#0D080D

muted

#7E7B7D

Preview Lab

Preview with #643D66

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

Preview Lab → · Contrast checker → · Palette generator →