#643B98#643B98

#643B98 is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.9% C 0.147 H 301.0°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#643B98
RGB	rgb(100, 59, 152)
HSL	hsl(266, 44%, 41%)
HSV	hsv(266, 61%, 60%)
CMYK	cmyk(34.2%, 61.2%, 0%, 40.4%)
CIE-LAB	lab(34.20, 37.80, -44.46)
CIE-LCH	lch(34.20, 58.36, 310.37°)
OKLab	oklab(44.89% 0.0756 -0.1261)
OKLCH	oklch(44.89% 0.147 301)
XYZ	xyz(12.4856, 8.1042, 30.6061)
Luminance	0.0810 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B98 #6F983B

analogous

#3B4098 #643B98 #933B98

triadic

#643B98 #98643B #3B9864

tetradic

#643B98 #983B40 #6F983B #3B9893

square

#643B98 #983B40 #6F983B #3B9893

split-complementary

#643B98 #98933B #40983B

monochromatic

#2A1940 #472A6C #643B98 #8254BD #A280CE

Accessibility & contrast

On white

8.01

#643B98 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#643B98 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B98

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B98	#FFFFFF	#000000	##FFFFFF
##643B98	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)

#04509B

Deuteranopia (green-blind)

#1E5096

Tritanopia (blue-blind)

#594E64

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643b98;
/* rgb */ color: rgb(100, 59, 152);
/* oklch */ color: oklch(44.9% 0.147 301.0);

Tailwind

colors: {
  custom: {
    50: '#9473b7',
    500: '#643b98',
    950: '#000000',
  },
}

SCSS

$custom: #643b98;
$custom-light: #9473b7;
$custom-dark: #000000;

JSON

{
  "hex": "#643b98",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 152
  },
  "hsl": {
    "h": 266.452,
    "s": 44.076,
    "l": 41.373
  },
  "oklch": {
    "l": 0.4489,
    "c": 0.14702,
    "h": 301
  },
  "luminance": 0.08104
}

Semantic roles & 50–950 ramp

primary

#643B98

secondary

#9BB777

accent

#D4549B

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643B98

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

Preview Lab → · Contrast checker → · Palette generator →