#643F86#643F86

#643F86 is a dark, moderate violet. Relative luminance 0.080; OKLCH L 44.3% C 0.118 H 306.3°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#643F86
RGB	rgb(100, 63, 134)
HSL	hsl(271, 36%, 39%)
HSV	hsv(271, 53%, 53%)
CMYK	cmyk(25.4%, 53%, 0%, 47.5%)
CIE-LAB	lab(33.95, 30.80, -33.83)
CIE-LCH	lch(33.95, 45.75, 312.31°)
OKLab	oklab(44.34% 0.0696 -0.0949)
OKLCH	oklch(44.34% 0.118 306.3)
XYZ	xyz(11.3352, 7.9857, 23.4939)
Luminance	0.0799 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F86 #61863F

analogous

#403F86 #643F86 #863F84

triadic

#643F86 #86643F #3F8664

tetradic

#643F86 #86403F #61863F #3F8486

square

#643F86 #86403F #61863F #3F8486

split-complementary

#643F86 #84863F #3F8640

monochromatic

#261833 #452B5C #643F86 #8354AE #A17DC2

Accessibility & contrast

On white

8.09

#643F86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#643F86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F86

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F86	#FFFFFF	#000000	##FFFFFF
##643F86	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4F88

Deuteranopia (green-blind)

#355084

Tritanopia (blue-blind)

#5F4C5C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643f86;
/* rgb */ color: rgb(100, 63, 134);
/* oklch */ color: oklch(44.3% 0.118 306.3);

Tailwind

colors: {
  custom: {
    50: '#9275a9',
    500: '#643f86',
    950: '#000000',
  },
}

SCSS

$custom: #643f86;
$custom-light: #9275a9;
$custom-dark: #000000;

JSON

{
  "hex": "#643f86",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 134
  },
  "hsl": {
    "h": 271.268,
    "s": 36.041,
    "l": 38.627
  },
  "oklch": {
    "l": 0.44344,
    "c": 0.11772,
    "h": 306.3
  },
  "luminance": 0.07986
}

Semantic roles & 50–950 ramp

primary

#643F86

secondary

#8FAC74

accent

#CC5C92

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643F86

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

Preview Lab → · Contrast checker → · Palette generator →