#643F90#643F90

#643F90 is a dark, vivid violet. Relative luminance 0.083; OKLCH L 45.0% C 0.131 H 302.6°. Best body text is #FFFFFF at 7.91:1 contrast (WCAG AA passes).

Color values

HEX	#643F90
RGB	rgb(100, 63, 144)
HSL	hsl(267, 39%, 41%)
HSV	hsv(267, 56%, 56%)
CMYK	cmyk(30.6%, 56.3%, 0%, 43.5%)
CIE-LAB	lab(34.56, 33.38, -39.02)
CIE-LCH	lch(34.56, 51.35, 310.55°)
OKLab	oklab(44.98% 0.0703 -0.1101)
OKLCH	oklch(44.98% 0.131 302.6)
XYZ	xyz(12.0659, 8.2779, 27.3423)
Luminance	0.0828 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F90 #6B903F

analogous

#3F4390 #643F90 #8C3F90

triadic

#643F90 #90643F #3F9064

tetradic

#643F90 #903F43 #6B903F #3F908C

square

#643F90 #903F43 #6B903F #3F908C

split-complementary

#643F90 #908C3F #43903F

monochromatic

#291A3B #462C65 #643F90 #8257B5 #A281C8

Accessibility & contrast

On white

7.91

#643F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#643F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F90

7.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F90	#FFFFFF	#000000	##FFFFFF
##643F90	1.00	7.91	2.66	7.91
#FFFFFF	7.91	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#205193

Deuteranopia (green-blind)

#2D518E

Tritanopia (blue-blind)

#5C4F61

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643f90;
/* rgb */ color: rgb(100, 63, 144);
/* oklch */ color: oklch(45.0% 0.131 302.6);

Tailwind

colors: {
  custom: {
    50: '#9375b1',
    500: '#643f90',
    950: '#000000',
  },
}

SCSS

$custom: #643f90;
$custom-light: #9375b1;
$custom-dark: #000000;

JSON

{
  "hex": "#643f90",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 144
  },
  "hsl": {
    "h": 267.407,
    "s": 39.13,
    "l": 40.588
  },
  "oklch": {
    "l": 0.44984,
    "c": 0.13062,
    "h": 302.6
  },
  "luminance": 0.08278
}

Semantic roles & 50–950 ramp

primary

#643F90

secondary

#98B278

accent

#CF5999

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643F90

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

Preview Lab → · Contrast checker → · Palette generator →