#643B66#643B66

#643B66 is a dark, moderate purple. Relative luminance 0.068; OKLCH L 41.8% C 0.086 H 325.3°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#643B66
RGB	rgb(100, 59, 102)
HSL	hsl(297, 27%, 32%)
HSV	hsv(297, 42%, 40%)
CMYK	cmyk(2%, 42.2%, 0%, 60%)
CIE-LAB	lab(31.34, 25.67, -17.85)
CIE-LCH	lch(31.34, 31.26, 325.19°)
OKLab	oklab(41.85% 0.0705 -0.0488)
OKLCH	oklch(41.85% 0.086 325.3)
XYZ	xyz(9.2176, 6.7970, 13.3942)
Luminance	0.0680 (WCAG relative)
Temperature	neutral
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B66 #3D663B

analogous

#4F3B66 #643B66 #663B53

triadic

#643B66 #66643B #3B6664

tetradic

#643B66 #664F3B #3D663B #3B5366

square

#643B66 #664F3B #3D663B #3B5366

split-complementary

#643B66 #53663B #3B664F

monochromatic

#180E18 #3E253F #643B66 #8A518D #A96FAC

Accessibility & contrast

On white

8.90

#643B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#643B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B66

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B66	#FFFFFF	#000000	##FFFFFF
##643B66	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#374768

Deuteranopia (green-blind)

#424C65

Tritanopia (blue-blind)

#663F4B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #643b66;
/* rgb */ color: rgb(100, 59, 102);
/* oklch */ color: oklch(41.8% 0.086 325.3);

Tailwind

colors: {
  custom: {
    50: '#917291',
    500: '#643b66',
    950: '#000000',
  },
}

SCSS

$custom: #643b66;
$custom-light: #917291;
$custom-dark: #000000;

JSON

{
  "hex": "#643b66",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 102
  },
  "hsl": {
    "h": 297.209,
    "s": 26.708,
    "l": 31.569
  },
  "oklch": {
    "l": 0.41849,
    "c": 0.08569,
    "h": 325.3
  },
  "luminance": 0.06797
}

Semantic roles & 50–950 ramp

primary

#643B66

secondary

#699667

accent

#C36569

background

#F9F6F8

surface

#F1ECF0

border

#CBC7CB

text

#0D080D

muted

#7E7B7D

Preview Lab

Preview with #643B66

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

Preview Lab → · Contrast checker → · Palette generator →