#643B99#643B99

#643B99 is a dark, vivid violet. Relative luminance 0.081; OKLCH L 45.0% C 0.148 H 300.7°. Best body text is #FFFFFF at 7.99:1 contrast (WCAG AA passes).

Color values

HEX	#643B99
RGB	rgb(100, 59, 153)
HSL	hsl(266, 44%, 42%)
HSV	hsv(266, 61%, 60%)
CMYK	cmyk(34.6%, 61.4%, 0%, 40%)
CIE-LAB	lab(34.27, 38.06, -44.96)
CIE-LCH	lch(34.27, 58.91, 310.25°)
OKLab	oklab(44.96% 0.0756 -0.1275)
OKLCH	oklch(44.96% 0.148 300.7)
XYZ	xyz(12.5679, 8.1371, 31.0393)
Luminance	0.0814 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B99 #70993B

analogous

#3B4199 #643B99 #933B99

triadic

#643B99 #99643B #3B9964

tetradic

#643B99 #993B41 #70993B #3B9993

square

#643B99 #993B41 #70993B #3B9993

split-complementary

#643B99 #99933B #41993B

monochromatic

#2A1941 #472A6D #643B99 #8254BD #A280CE

Accessibility & contrast

On white

7.99

#643B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#643B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B99

7.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B99	#FFFFFF	#000000	##FFFFFF
##643B99	1.00	7.99	2.63	7.99
#FFFFFF	7.99	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01509C

Deuteranopia (green-blind)

#1C5097

Tritanopia (blue-blind)

#594F64

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643b99;
/* rgb */ color: rgb(100, 59, 153);
/* oklch */ color: oklch(45.0% 0.148 300.7);

Tailwind

colors: {
  custom: {
    50: '#9473b8',
    500: '#643b99',
    950: '#000000',
  },
}

SCSS

$custom: #643b99;
$custom-light: #9473b8;
$custom-dark: #000000;

JSON

{
  "hex": "#643b99",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 153
  },
  "hsl": {
    "h": 266.17,
    "s": 44.34,
    "l": 41.569
  },
  "oklch": {
    "l": 0.44961,
    "c": 0.14825,
    "h": 300.7
  },
  "luminance": 0.08137
}

Semantic roles & 50–950 ramp

primary

#643B99

secondary

#9CB878

accent

#D4549C

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643B99

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

Preview Lab → · Contrast checker → · Palette generator →