#643BB1#643BB1

#643BB1 is a mid, vivid violet. Relative luminance 0.090; OKLCH L 46.8% C 0.178 H 294.5°. Best body text is #FFFFFF at 7.49:1 contrast (WCAG AA passes).

Color values

HEX	#643BB1
RGB	rgb(100, 59, 177)
HSL	hsl(261, 50%, 46%)
HSV	hsv(261, 67%, 69%)
CMYK	cmyk(43.5%, 66.7%, 0%, 30.6%)
CIE-LAB	lab(36.01, 44.55, -56.55)
CIE-LCH	lch(36.01, 71.99, 308.23°)
OKLab	oklab(46.77% 0.0736 -0.1616)
OKLCH	oklch(46.77% 0.178 294.5)
XYZ	xyz(14.7532, 9.0112, 42.5485)
Luminance	0.0901 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Bluey Purple

#6241C7

ΔE00 3.68

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643BB1 #88B13B

analogous

#3B4DB1 #643BB1 #9F3BB1

triadic

#643BB1 #B1643B #3BB164

tetradic

#643BB1 #B13B4D #88B13B #3BB19F

square

#643BB1 #B13B4D #88B13B #3BB19F

split-complementary

#643BB1 #B19F3B #4DB13B

monochromatic

#301C55 #4A2C83 #643BB1 #845FCA #A88DD9

Accessibility & contrast

On white

7.49

#643BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#643BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643BB1

7.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643BB1	#FFFFFF	#000000	##FFFFFF
##643BB1	1.00	7.49	2.80	7.49
#FFFFFF	7.49	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B5

Deuteranopia (green-blind)

#0053AF

Tritanopia (blue-blind)

#4F5771

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #643bb1;
/* rgb */ color: rgb(100, 59, 177);
/* oklch */ color: oklch(46.8% 0.178 294.5);

Tailwind

colors: {
  custom: {
    50: '#9674c9',
    500: '#643bb1',
    950: '#000000',
  },
}

SCSS

$custom: #643bb1;
$custom-light: #9674c9;
$custom-dark: #000000;

JSON

{
  "hex": "#643bb1",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 177
  },
  "hsl": {
    "h": 260.847,
    "s": 50,
    "l": 46.275
  },
  "oklch": {
    "l": 0.4677,
    "c": 0.17758,
    "h": 294.5
  },
  "luminance": 0.09012
}

Semantic roles & 50–950 ramp

primary

#643BB1

secondary

#AEC484

accent

#DA4EA9

background

#F9F7FC

surface

#F2EDF8

border

#CCC8D1

text

#0E0813

muted

#7E7B82

Preview Lab

Preview with #643BB1

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

Preview Lab → · Contrast checker → · Palette generator →