#643D91#643D91

#643D91 is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.7% C 0.135 H 302.7°. Best body text is #FFFFFF at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#643D91
RGB	rgb(100, 61, 145)
HSL	hsl(268, 41%, 40%)
HSV	hsv(268, 58%, 57%)
CMYK	cmyk(31%, 57.9%, 0%, 43.1%)
CIE-LAB	lab(34.17, 34.81, -40.24)
CIE-LCH	lch(34.17, 53.21, 310.86°)
OKLab	oklab(44.72% 0.073 -0.1137)
OKLCH	oklch(44.72% 0.135 302.7)
XYZ	xyz(12.0339, 8.0911, 27.7103)
Luminance	0.0809 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D91 #6A913D

analogous

#3D4091 #643D91 #8E3D91

triadic

#643D91 #91643D #3D9164

tetradic

#643D91 #913D40 #6A913D #3D918E

square

#643D91 #913D40 #6A913D #3D918E

split-complementary

#643D91 #918E3D #40913D

monochromatic

#29193B #462B66 #643D91 #8254B7 #A27FC9

Accessibility & contrast

On white

8.02

#643D91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#643D91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D91

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D91	#FFFFFF	#000000	##FFFFFF
##643D91	1.00	8.02	2.62	8.02
#FFFFFF	8.02	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A5094

Deuteranopia (green-blind)

#29508F

Tritanopia (blue-blind)

#5B4E61

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643d91;
/* rgb */ color: rgb(100, 61, 145);
/* oklch */ color: oklch(44.7% 0.135 302.7);

Tailwind

colors: {
  custom: {
    50: '#9374b2',
    500: '#643d91',
    950: '#000000',
  },
}

SCSS

$custom: #643d91;
$custom-light: #9374b2;
$custom-dark: #000000;

JSON

{
  "hex": "#643d91",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 145
  },
  "hsl": {
    "h": 267.857,
    "s": 40.777,
    "l": 40.392
  },
  "oklch": {
    "l": 0.44723,
    "c": 0.13511,
    "h": 302.7
  },
  "luminance": 0.08091
}

Semantic roles & 50–950 ramp

primary

#643D91

secondary

#97B377

accent

#D15798

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643D91

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

Preview Lab → · Contrast checker → · Palette generator →