#643A9B#643A9B

#643A9B is a dark, vivid violet. Relative luminance 0.081; OKLCH L 45.0% C 0.152 H 300.3°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#643A9B
RGB	rgb(100, 58, 155)
HSL	hsl(266, 46%, 42%)
HSV	hsv(266, 63%, 61%)
CMYK	cmyk(35.5%, 62.6%, 0%, 39.2%)
CIE-LAB	lab(34.19, 39.15, -46.29)
CIE-LCH	lch(34.19, 60.63, 310.22°)
OKLab	oklab(44.95% 0.0768 -0.1314)
OKLCH	oklch(44.95% 0.152 300.3)
XYZ	xyz(12.6835, 8.1019, 31.8996)
Luminance	0.0810 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A9B #719B3A

analogous

#3A419B #643A9B #953A9B

triadic

#643A9B #9B643A #3A9B64

tetradic

#643A9B #9B3A41 #719B3A #3A9B95

square

#643A9B #9B3A41 #719B3A #3A9B95

split-complementary

#643A9B #9B953A #419B3A

monochromatic

#2B1942 #47296E #643A9B #8253BF #A280CF

Accessibility & contrast

On white

8.01

#643A9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#643A9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A9B

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A9B	#FFFFFF	#000000	##FFFFFF
##643A9B	1.00	8.01	2.62	8.01
#FFFFFF	8.01	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509E

Deuteranopia (green-blind)

#175099

Tritanopia (blue-blind)

#584F65

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643a9b;
/* rgb */ color: rgb(100, 58, 155);
/* oklch */ color: oklch(45.0% 0.152 300.3);

Tailwind

colors: {
  custom: {
    50: '#9472b9',
    500: '#643a9b',
    950: '#000000',
  },
}

SCSS

$custom: #643a9b;
$custom-light: #9472b9;
$custom-dark: #000000;

JSON

{
  "hex": "#643a9b",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 155
  },
  "hsl": {
    "h": 265.979,
    "s": 45.54,
    "l": 41.765
  },
  "oklch": {
    "l": 0.44952,
    "c": 0.15222,
    "h": 300.3
  },
  "luminance": 0.08102
}

Semantic roles & 50–950 ramp

primary

#643A9B

secondary

#9DB978

accent

#D5539D

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0E0811

muted

#7E7B80

Preview Lab

Preview with #643A9B

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

Preview Lab → · Contrast checker → · Palette generator →