#643E90#643E90

#643E90 is a dark, vivid violet. Relative luminance 0.082; OKLCH L 44.8% C 0.132 H 302.8°. Best body text is #FFFFFF at 7.97:1 contrast (WCAG AA passes).

Color values

HEX	#643E90
RGB	rgb(100, 62, 144)
HSL	hsl(268, 40%, 40%)
HSV	hsv(268, 57%, 56%)
CMYK	cmyk(30.6%, 56.9%, 0%, 43.5%)
CIE-LAB	lab(34.33, 33.97, -39.37)
CIE-LCH	lch(34.33, 52.00, 310.78°)
OKLab	oklab(44.82% 0.0717 -0.1111)
OKLCH	oklch(44.82% 0.132 302.8)
XYZ	xyz(12.0111, 8.1682, 27.3240)
Luminance	0.0817 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E90 #6A903E

analogous

#3E4190 #643E90 #8D3E90

triadic

#643E90 #90643E #3E9064

tetradic

#643E90 #903E41 #6A903E #3E908D

square

#643E90 #903E41 #6A903E #3E908D

split-complementary

#643E90 #908D3E #41903E

monochromatic

#29193A #462C65 #643E90 #8255B6 #A280C8

Accessibility & contrast

On white

7.97

#643E90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#643E90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E90

7.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E90	#FFFFFF	#000000	##FFFFFF
##643E90	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)

#1E5093

Deuteranopia (green-blind)

#2C518E

Tritanopia (blue-blind)

#5C4E61

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643e90;
/* rgb */ color: rgb(100, 62, 144);
/* oklch */ color: oklch(44.8% 0.132 302.8);

Tailwind

colors: {
  custom: {
    50: '#9375b1',
    500: '#643e90',
    950: '#000000',
  },
}

SCSS

$custom: #643e90;
$custom-light: #9375b1;
$custom-dark: #000000;

JSON

{
  "hex": "#643e90",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 144
  },
  "hsl": {
    "h": 267.805,
    "s": 39.806,
    "l": 40.392
  },
  "oklch": {
    "l": 0.44819,
    "c": 0.13224,
    "h": 302.8
  },
  "luminance": 0.08168
}

Semantic roles & 50–950 ramp

primary

#643E90

secondary

#97B277

accent

#D05898

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643E90

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

Preview Lab → · Contrast checker → · Palette generator →