#643AB4#643AB4

#643AB4 is a mid, vivid violet. Relative luminance 0.090; OKLCH L 46.9% C 0.182 H 294.0°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#643AB4
RGB	rgb(100, 58, 180)
HSL	hsl(261, 51%, 47%)
HSV	hsv(261, 68%, 71%)
CMYK	cmyk(44.4%, 67.8%, 0%, 29.4%)
CIE-LAB	lab(36.04, 45.91, -58.27)
CIE-LCH	lch(36.04, 74.18, 308.23°)
OKLab	oklab(46.87% 0.0742 -0.1667)
OKLCH	oklch(46.87% 0.182 294)
XYZ	xyz(15.0046, 9.0303, 44.1236)
Luminance	0.0903 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Bluey Purple

#6241C7

ΔE00 3.38

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643AB4 #8AB43A

analogous

#3A4DB4 #643AB4 #A13AB4

triadic

#643AB4 #B4643A #3AB464

tetradic

#643AB4 #B43A4D #8AB43A #3AB4A1

square

#643AB4 #B43A4D #8AB43A #3AB4A1

split-complementary

#643AB4 #B4A13A #4DB43A

monochromatic

#311C57 #4A2B86 #643AB4 #8560CC #A88EDB

Accessibility & contrast

On white

7.48

#643AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#643AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643AB4

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643AB4	#FFFFFF	#000000	##FFFFFF
##643AB4	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B8

Deuteranopia (green-blind)

#0053B2

Tritanopia (blue-blind)

#4D5872

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #643ab4;
/* rgb */ color: rgb(100, 58, 180);
/* oklch */ color: oklch(46.9% 0.182 294.0);

Tailwind

colors: {
  custom: {
    50: '#9773cb',
    500: '#643ab4',
    950: '#000000',
  },
}

SCSS

$custom: #643ab4;
$custom-light: #9773cb;
$custom-dark: #000000;

JSON

{
  "hex": "#643ab4",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 180
  },
  "hsl": {
    "h": 260.656,
    "s": 51.261,
    "l": 46.667
  },
  "oklch": {
    "l": 0.4687,
    "c": 0.18244,
    "h": 294
  },
  "luminance": 0.09031
}

Semantic roles & 50–950 ramp

primary

#643AB4

secondary

#AFC585

accent

#DB4DAA

background

#F9F7FC

surface

#F2EDF9

border

#CCC8D2

text

#0E0813

muted

#7E7B82

Preview Lab

Preview with #643AB4

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

Preview Lab → · Contrast checker → · Palette generator →