#643E8A#643E8A

#643E8A is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.4% C 0.125 H 305.0°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#643E8A
RGB	rgb(100, 62, 138)
HSL	hsl(270, 38%, 39%)
HSV	hsv(270, 55%, 54%)
CMYK	cmyk(27.5%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(33.96, 32.41, -36.28)
CIE-LCH	lch(33.96, 48.65, 311.77°)
OKLab	oklab(44.43% 0.0714 -0.1021)
OKLCH	oklch(44.43% 0.125 305)
XYZ	xyz(11.5646, 7.9896, 24.9727)
Luminance	0.0799 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E8A #648A3E

analogous

#3E3E8A #643E8A #8A3E8A

triadic

#643E8A #8A643E #3E8A64

tetradic

#643E8A #8A3E3E #648A3E #3E8A8A

square

#643E8A #8A3E3E #648A3E #3E8A8A

split-complementary

#643E8A #8A8A3E #3E8A3E

monochromatic

#271836 #452B60 #643E8A #8353B2 #A17EC5

Accessibility & contrast

On white

8.08

#643E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#643E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E8A

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E8A	#FFFFFF	#000000	##FFFFFF
##643E8A	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244F8D

Deuteranopia (green-blind)

#315088

Tritanopia (blue-blind)

#5E4C5E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643e8a;
/* rgb */ color: rgb(100, 62, 138);
/* oklch */ color: oklch(44.4% 0.125 305.0);

Tailwind

colors: {
  custom: {
    50: '#9275ac',
    500: '#643e8a',
    950: '#000000',
  },
}

SCSS

$custom: #643e8a;
$custom-light: #9275ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643e8a",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 270,
    "s": 38,
    "l": 39.216
  },
  "oklch": {
    "l": 0.44427,
    "c": 0.12456,
    "h": 305
  },
  "luminance": 0.0799
}

Semantic roles & 50–950 ramp

primary

#643E8A

secondary

#92AF75

accent

#CE5A94

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643E8A

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

Preview Lab → · Contrast checker → · Palette generator →