#643A9A#643A9A

#643A9A is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.9% C 0.151 H 300.6°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#643A9A
RGB	rgb(100, 58, 154)
HSL	hsl(266, 45%, 42%)
HSV	hsv(266, 62%, 60%)
CMYK	cmyk(35.1%, 62.3%, 0%, 39.6%)
CIE-LAB	lab(34.13, 38.89, -45.80)
CIE-LCH	lch(34.13, 60.08, 310.34°)
OKLab	oklab(44.88% 0.0768 -0.13)
OKLCH	oklch(44.88% 0.151 300.6)
XYZ	xyz(12.5999, 8.0685, 31.4591)
Luminance	0.0807 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A9A #709A3A

analogous

#3A409A #643A9A #943A9A

triadic

#643A9A #9A643A #3A9A64

tetradic

#643A9A #9A3A40 #709A3A #3A9A94

square

#643A9A #9A3A40 #709A3A #3A9A94

split-complementary

#643A9A #9A943A #409A3A

monochromatic

#2A1941 #47296E #643A9A #8253BE #A27FCF

Accessibility & contrast

On white

8.03

#643A9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#643A9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A9A

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A9A	#FFFFFF	#000000	##FFFFFF
##643A9A	1.00	8.03	2.61	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509D

Deuteranopia (green-blind)

#195098

Tritanopia (blue-blind)

#594E64

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643a9a;
/* rgb */ color: rgb(100, 58, 154);
/* oklch */ color: oklch(44.9% 0.151 300.6);

Tailwind

colors: {
  custom: {
    50: '#9472b8',
    500: '#643a9a',
    950: '#000000',
  },
}

SCSS

$custom: #643a9a;
$custom-light: #9472b8;
$custom-dark: #000000;

JSON

{
  "hex": "#643a9a",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 154
  },
  "hsl": {
    "h": 266.25,
    "s": 45.283,
    "l": 41.569
  },
  "oklch": {
    "l": 0.4488,
    "c": 0.15098,
    "h": 300.6
  },
  "luminance": 0.08069
}

Semantic roles & 50–950 ramp

primary

#643A9A

secondary

#9CB977

accent

#D5539C

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0E0811

muted

#7E7B80

Preview Lab

Preview with #643A9A

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

Preview Lab → · Contrast checker → · Palette generator →