#643F83#643F83

#643F83 is a dark, moderate violet. Relative luminance 0.079; OKLCH L 44.2% C 0.114 H 307.5°. Best body text is #FFFFFF at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#643F83
RGB	rgb(100, 63, 131)
HSL	hsl(273, 35%, 38%)
HSV	hsv(273, 52%, 51%)
CMYK	cmyk(23.7%, 51.9%, 0%, 48.6%)
CIE-LAB	lab(33.78, 30.04, -32.25)
CIE-LCH	lch(33.78, 44.07, 312.97°)
OKLab	oklab(44.16% 0.0693 -0.0903)
OKLCH	oklch(44.16% 0.114 307.5)
XYZ	xyz(11.1290, 7.9032, 22.4075)
Luminance	0.0790 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F83 #5E833F

analogous

#423F83 #643F83 #833F80

triadic

#643F83 #83643F #3F8364

tetradic

#643F83 #83423F #5E833F #3F8083

square

#643F83 #83423F #5E833F #3F8083

split-complementary

#643F83 #80833F #3F8342

monochromatic

#251730 #442B5A #643F83 #8453AC #A17CC0

Accessibility & contrast

On white

8.14

#643F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#643F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F83

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F83	#FFFFFF	#000000	##FFFFFF
##643F83	1.00	8.14	2.58	8.14
#FFFFFF	8.14	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4E85

Deuteranopia (green-blind)

#375081

Tritanopia (blue-blind)

#5F4B5B

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643f83;
/* rgb */ color: rgb(100, 63, 131);
/* oklch */ color: oklch(44.2% 0.114 307.5);

Tailwind

colors: {
  custom: {
    50: '#9275a7',
    500: '#643f83',
    950: '#000000',
  },
}

SCSS

$custom: #643f83;
$custom-light: #9275a7;
$custom-dark: #000000;

JSON

{
  "hex": "#643f83",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 131
  },
  "hsl": {
    "h": 272.647,
    "s": 35.052,
    "l": 38.039
  },
  "oklch": {
    "l": 0.4416,
    "c": 0.11384,
    "h": 307.5
  },
  "luminance": 0.07903
}

Semantic roles & 50–950 ramp

primary

#643F83

secondary

#8CAA73

accent

#CB5D8F

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643F83

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

Preview Lab → · Contrast checker → · Palette generator →