#643F91#643F91

#643F91 is a mid, vivid violet. Relative luminance 0.083; OKLCH L 45.1% C 0.132 H 302.2°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#643F91
RGB	rgb(100, 63, 145)
HSL	hsl(267, 39%, 41%)
HSV	hsv(267, 57%, 57%)
CMYK	cmyk(31%, 56.6%, 0%, 43.1%)
CIE-LAB	lab(34.62, 33.64, -39.53)
CIE-LCH	lch(34.62, 51.91, 310.40°)
OKLab	oklab(45.05% 0.0703 -0.1116)
OKLCH	oklch(45.05% 0.132 302.2)
XYZ	xyz(12.1427, 8.3087, 27.7466)
Luminance	0.0831 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F91 #6C913F

analogous

#3F4391 #643F91 #8D3F91

triadic

#643F91 #91643F #3F9164

tetradic

#643F91 #913F43 #6C913F #3F918D

square

#643F91 #913F43 #6C913F #3F918D

split-complementary

#643F91 #918D3F #43913F

monochromatic

#291A3C #472C66 #643F91 #8257B6 #A282C9

Accessibility & contrast

On white

7.89

#643F91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#643F91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F91

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F91	#FFFFFF	#000000	##FFFFFF
##643F91	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F5194

Deuteranopia (green-blind)

#2C518F

Tritanopia (blue-blind)

#5B4F62

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643f91;
/* rgb */ color: rgb(100, 63, 145);
/* oklch */ color: oklch(45.1% 0.132 302.2);

Tailwind

colors: {
  custom: {
    50: '#9375b2',
    500: '#643f91',
    950: '#000000',
  },
}

SCSS

$custom: #643f91;
$custom-light: #9375b2;
$custom-dark: #000000;

JSON

{
  "hex": "#643f91",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 145
  },
  "hsl": {
    "h": 267.073,
    "s": 39.423,
    "l": 40.784
  },
  "oklch": {
    "l": 0.4505,
    "c": 0.1319,
    "h": 302.2
  },
  "luminance": 0.08309
}

Semantic roles & 50–950 ramp

primary

#643F91

secondary

#99B379

accent

#CF589A

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643F91

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

Preview Lab → · Contrast checker → · Palette generator →