#643E91#643E91

#643E91 is a dark, vivid violet. Relative luminance 0.082; OKLCH L 44.9% C 0.134 H 302.5°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#643E91
RGB	rgb(100, 62, 145)
HSL	hsl(267, 40%, 41%)
HSV	hsv(267, 57%, 57%)
CMYK	cmyk(31%, 57.2%, 0%, 43.1%)
CIE-LAB	lab(34.39, 34.23, -39.88)
CIE-LCH	lch(34.39, 52.56, 310.64°)
OKLab	oklab(44.89% 0.0717 -0.1126)
OKLCH	oklch(44.89% 0.134 302.5)
XYZ	xyz(12.0878, 8.1989, 27.7283)
Luminance	0.0820 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E91 #6B913E

analogous

#3E4191 #643E91 #8D3E91

triadic

#643E91 #91643E #3E9164

tetradic

#643E91 #913E41 #6B913E #3E918D

square

#643E91 #913E41 #6B913E #3E918D

split-complementary

#643E91 #918D3E #41913E

monochromatic

#29193B #462C66 #643E91 #8256B7 #A280C9

Accessibility & contrast

On white

7.96

#643E91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#643E91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E91

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E91	#FFFFFF	#000000	##FFFFFF
##643E91	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D5094

Deuteranopia (green-blind)

#2B518F

Tritanopia (blue-blind)

#5B4E61

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643e91;
/* rgb */ color: rgb(100, 62, 145);
/* oklch */ color: oklch(44.9% 0.134 302.5);

Tailwind

colors: {
  custom: {
    50: '#9375b2',
    500: '#643e91',
    950: '#000000',
  },
}

SCSS

$custom: #643e91;
$custom-light: #9375b2;
$custom-dark: #000000;

JSON

{
  "hex": "#643e91",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 145
  },
  "hsl": {
    "h": 267.47,
    "s": 40.097,
    "l": 40.588
  },
  "oklch": {
    "l": 0.44885,
    "c": 0.13352,
    "h": 302.5
  },
  "luminance": 0.08199
}

Semantic roles & 50–950 ramp

primary

#643E91

secondary

#98B378

accent

#D05899

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643E91

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

Preview Lab → · Contrast checker → · Palette generator →