#643D8A#643D8A

#643D8A is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.3% C 0.126 H 305.2°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#643D8A
RGB	rgb(100, 61, 138)
HSL	hsl(270, 39%, 39%)
HSV	hsv(270, 56%, 54%)
CMYK	cmyk(27.5%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(33.74, 33.00, -36.64)
CIE-LCH	lch(33.74, 49.31, 312.00°)
OKLab	oklab(44.26% 0.0728 -0.1031)
OKLCH	oklch(44.26% 0.126 305.2)
XYZ	xyz(11.5107, 7.8819, 24.9548)
Luminance	0.0788 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D8A #638A3D

analogous

#3E3D8A #643D8A #8A3D8A

triadic

#643D8A #8A643D #3D8A64

tetradic

#643D8A #8A3E3D #638A3D #3D8A8A

square

#643D8A #8A3E3D #638A3D #3D8A8A

split-complementary

#643D8A #8A8A3D #3D8A3E

monochromatic

#261735 #452A60 #643D8A #8352B2 #A17CC5

Accessibility & contrast

On white

8.15

#643D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#643D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D8A

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D8A	#FFFFFF	#000000	##FFFFFF
##643D8A	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234E8D

Deuteranopia (green-blind)

#304F88

Tritanopia (blue-blind)

#5E4B5D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643d8a;
/* rgb */ color: rgb(100, 61, 138);
/* oklch */ color: oklch(44.3% 0.126 305.2);

Tailwind

colors: {
  custom: {
    50: '#9274ac',
    500: '#643d8a',
    950: '#000000',
  },
}

SCSS

$custom: #643d8a;
$custom-light: #9274ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643d8a",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 270.39,
    "s": 38.693,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44261,
    "c": 0.12623,
    "h": 305.2
  },
  "luminance": 0.07882
}

Semantic roles & 50–950 ramp

primary

#643D8A

secondary

#91AF74

accent

#CF5993

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643D8A

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

Preview Lab → · Contrast checker → · Palette generator →