#643B9B#643B9B

#643B9B is a mid, vivid violet. Relative luminance 0.082; OKLCH L 45.1% C 0.151 H 300.1°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#643B9B
RGB	rgb(100, 59, 155)
HSL	hsl(266, 45%, 42%)
HSV	hsv(266, 62%, 61%)
CMYK	cmyk(35.5%, 61.9%, 0%, 39.2%)
CIE-LAB	lab(34.40, 38.59, -45.95)
CIE-LCH	lch(34.40, 60.01, 310.02°)
OKLab	oklab(45.1% 0.0755 -0.1304)
OKLCH	oklch(45.1% 0.151 300.1)
XYZ	xyz(12.7345, 8.2037, 31.9166)
Luminance	0.0820 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B9B #729B3B

analogous

#3B429B #643B9B #943B9B

triadic

#643B9B #9B643B #3B9B64

tetradic

#643B9B #9B3B42 #729B3B #3B9B94

square

#643B9B #9B3B42 #729B3B #3B9B94

split-complementary

#643B9B #9B943B #429B3B

monochromatic

#2B1942 #472A6F #643B9B #8255BE #A381CF

Accessibility & contrast

On white

7.95

#643B9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#643B9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B9B

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B9B	#FFFFFF	#000000	##FFFFFF
##643B9B	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00519E

Deuteranopia (green-blind)

#195099

Tritanopia (blue-blind)

#584F65

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643b9b;
/* rgb */ color: rgb(100, 59, 155);
/* oklch */ color: oklch(45.1% 0.151 300.1);

Tailwind

colors: {
  custom: {
    50: '#9473b9',
    500: '#643b9b',
    950: '#000000',
  },
}

SCSS

$custom: #643b9b;
$custom-light: #9473b9;
$custom-dark: #000000;

JSON

{
  "hex": "#643b9b",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 155
  },
  "hsl": {
    "h": 265.625,
    "s": 44.86,
    "l": 41.961
  },
  "oklch": {
    "l": 0.45104,
    "c": 0.15074,
    "h": 300.1
  },
  "luminance": 0.08204
}

Semantic roles & 50–950 ramp

primary

#643B9B

secondary

#9EB979

accent

#D5539D

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0E0811

muted

#7E7B80

Preview Lab

Preview with #643B9B

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

Preview Lab → · Contrast checker → · Palette generator →