#643C8A#643C8A

#643C8A is a dark, vivid violet. Relative luminance 0.078; OKLCH L 44.1% C 0.128 H 305.5°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#643C8A
RGB	rgb(100, 60, 138)
HSL	hsl(271, 39%, 39%)
HSV	hsv(271, 57%, 54%)
CMYK	cmyk(27.5%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(33.51, 33.58, -37.00)
CIE-LCH	lch(33.51, 49.97, 312.23°)
OKLab	oklab(44.1% 0.0742 -0.1042)
OKLCH	oklch(44.1% 0.128 305.5)
XYZ	xyz(11.4579, 7.7761, 24.9371)
Luminance	0.0778 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C8A #628A3C

analogous

#3D3C8A #643C8A #8A3C89

triadic

#643C8A #8A643C #3C8A64

tetradic

#643C8A #8A3D3C #628A3C #3C898A

square

#643C8A #8A3D3C #628A3C #3C898A

split-complementary

#643C8A #898A3C #3C8A3D

monochromatic

#261735 #45295F #643C8A #8350B3 #A17BC6

Accessibility & contrast

On white

8.22

#643C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#643C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C8A

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C8A	#FFFFFF	#000000	##FFFFFF
##643C8A	1.00	8.22	2.56	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214E8D

Deuteranopia (green-blind)

#2E4F88

Tritanopia (blue-blind)

#5E4B5D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643c8a;
/* rgb */ color: rgb(100, 60, 138);
/* oklch */ color: oklch(44.1% 0.128 305.5);

Tailwind

colors: {
  custom: {
    50: '#9373ac',
    500: '#643c8a',
    950: '#000000',
  },
}

SCSS

$custom: #643c8a;
$custom-light: #9373ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643c8a",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 270.769,
    "s": 39.394,
    "l": 38.824
  },
  "oklch": {
    "l": 0.44096,
    "c": 0.12789,
    "h": 305.5
  },
  "luminance": 0.07776
}

Semantic roles & 50–950 ramp

primary

#643C8A

secondary

#90AF73

accent

#CF5992

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643C8A

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

Preview Lab → · Contrast checker → · Palette generator →