#643A8A#643A8A

#643A8A is a dark, vivid violet. Relative luminance 0.076; OKLCH L 43.8% C 0.131 H 305.9°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#643A8A
RGB	rgb(100, 58, 138)
HSL	hsl(272, 41%, 38%)
HSV	hsv(272, 58%, 54%)
CMYK	cmyk(27.5%, 58%, 0%, 45.9%)
CIE-LAB	lab(33.07, 34.74, -37.70)
CIE-LCH	lch(33.07, 51.27, 312.66°)
OKLab	oklab(43.77% 0.077 -0.1062)
OKLCH	oklch(43.77% 0.131 305.9)
XYZ	xyz(11.3551, 7.5705, 24.9029)
Luminance	0.0757 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A8A #608A3A

analogous

#3C3A8A #643A8A #8A3A88

triadic

#643A8A #8A643A #3A8A64

tetradic

#643A8A #8A3C3A #608A3A #3A888A

square

#643A8A #8A3C3A #608A3A #3A888A

split-complementary

#643A8A #888A3A #3A8A3C

monochromatic

#261634 #45285F #643A8A #834DB4 #A178C6

Accessibility & contrast

On white

8.35

#643A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#643A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A8A

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A8A	#FFFFFF	#000000	##FFFFFF
##643A8A	1.00	8.35	2.51	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4C8D

Deuteranopia (green-blind)

#2C4E88

Tritanopia (blue-blind)

#5E495C

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643a8a;
/* rgb */ color: rgb(100, 58, 138);
/* oklch */ color: oklch(43.8% 0.131 305.9);

Tailwind

colors: {
  custom: {
    50: '#9372ad',
    500: '#643a8a',
    950: '#000000',
  },
}

SCSS

$custom: #643a8a;
$custom-light: #9372ad;
$custom-dark: #000000;

JSON

{
  "hex": "#643a8a",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 271.5,
    "s": 40.816,
    "l": 38.431
  },
  "oklch": {
    "l": 0.43772,
    "c": 0.13118,
    "h": 305.9
  },
  "luminance": 0.0757
}

Semantic roles & 50–950 ramp

primary

#643A8A

secondary

#8EB070

accent

#D15791

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643A8A

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

Preview Lab → · Contrast checker → · Palette generator →