#643B96#643B96

#643B96 is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.7% C 0.145 H 301.6°. Best body text is #FFFFFF at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#643B96
RGB	rgb(100, 59, 150)
HSL	hsl(267, 44%, 41%)
HSV	hsv(267, 61%, 59%)
CMYK	cmyk(33.3%, 60.7%, 0%, 41.2%)
CIE-LAB	lab(34.06, 37.27, -43.46)
CIE-LCH	lch(34.06, 57.25, 310.61°)
OKLab	oklab(44.75% 0.0757 -0.1231)
OKLCH	oklch(44.75% 0.145 301.6)
XYZ	xyz(12.3232, 8.0392, 29.7507)
Luminance	0.0804 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B96 #6D963B

analogous

#3B3F96 #643B96 #913B96

triadic

#643B96 #96643B #3B9664

tetradic

#643B96 #963B3F #6D963B #3B9691

square

#643B96 #963B3F #6D963B #3B9691

split-complementary

#643B96 #96913B #3F963B

monochromatic

#29183E #472A6A #643B96 #8253BB #A27FCD

Accessibility & contrast

On white

8.05

#643B96 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#643B96 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B96

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B96	#FFFFFF	#000000	##FFFFFF
##643B96	1.00	8.05	2.61	8.05
#FFFFFF	8.05	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A5099

Deuteranopia (green-blind)

#215094

Tritanopia (blue-blind)

#5A4E63

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643b96;
/* rgb */ color: rgb(100, 59, 150);
/* oklch */ color: oklch(44.7% 0.145 301.6);

Tailwind

colors: {
  custom: {
    50: '#9473b5',
    500: '#643b96',
    950: '#000000',
  },
}

SCSS

$custom: #643b96;
$custom-light: #9473b5;
$custom-dark: #000000;

JSON

{
  "hex": "#643b96",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 150
  },
  "hsl": {
    "h": 267.033,
    "s": 43.541,
    "l": 40.98
  },
  "oklch": {
    "l": 0.44749,
    "c": 0.14453,
    "h": 301.6
  },
  "luminance": 0.08039
}

Semantic roles & 50–950 ramp

primary

#643B96

secondary

#9AB677

accent

#D3559A

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643B96

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

Preview Lab → · Contrast checker → · Palette generator →