#643B9A#643B9A

#643B9A is a mid, vivid violet. Relative luminance 0.082; OKLCH L 45.0% C 0.149 H 300.4°. Best body text is #FFFFFF at 7.97:1 contrast (WCAG AA passes).

Color values

HEX	#643B9A
RGB	rgb(100, 59, 154)
HSL	hsl(266, 45%, 42%)
HSV	hsv(266, 62%, 60%)
CMYK	cmyk(35.1%, 61.7%, 0%, 39.6%)
CIE-LAB	lab(34.34, 38.33, -45.46)
CIE-LCH	lch(34.34, 59.46, 310.13°)
OKLab	oklab(45.03% 0.0756 -0.129)
OKLCH	oklch(45.03% 0.15 300.4)
XYZ	xyz(12.6508, 8.1703, 31.4761)
Luminance	0.0817 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B9A #719A3B

analogous

#3B419A #643B9A #943B9A

triadic

#643B9A #9A643B #3B9A64

tetradic

#643B9A #9A3B41 #719A3B #3B9A94

square

#643B9A #9A3B41 #719A3B #3B9A94

split-complementary

#643B9A #9A943B #419A3B

monochromatic

#2B1942 #472A6E #643B9A #8255BE #A281CF

Accessibility & contrast

On white

7.97

#643B9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#643B9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B9A

7.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B9A	#FFFFFF	#000000	##FFFFFF
##643B9A	1.00	7.97	2.63	7.97
#FFFFFF	7.97	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509D

Deuteranopia (green-blind)

#1B5098

Tritanopia (blue-blind)

#594F65

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643b9a;
/* rgb */ color: rgb(100, 59, 154);
/* oklch */ color: oklch(45.0% 0.149 300.4);

Tailwind

colors: {
  custom: {
    50: '#9473b8',
    500: '#643b9a',
    950: '#000000',
  },
}

SCSS

$custom: #643b9a;
$custom-light: #9473b8;
$custom-dark: #000000;

JSON

{
  "hex": "#643b9a",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 154
  },
  "hsl": {
    "h": 265.895,
    "s": 44.601,
    "l": 41.765
  },
  "oklch": {
    "l": 0.45032,
    "c": 0.1495,
    "h": 300.4
  },
  "luminance": 0.0817
}

Semantic roles & 50–950 ramp

primary

#643B9A

secondary

#9DB878

accent

#D4539D

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643B9A

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

Preview Lab → · Contrast checker → · Palette generator →