#643C8D#643C8D

#643C8D is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.3% C 0.132 H 304.4°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#643C8D
RGB	rgb(100, 60, 141)
HSL	hsl(270, 40%, 39%)
HSV	hsv(270, 57%, 55%)
CMYK	cmyk(29.1%, 57.4%, 0%, 44.7%)
CIE-LAB	lab(33.70, 34.35, -38.55)
CIE-LCH	lch(33.70, 51.63, 311.71°)
OKLab	oklab(44.29% 0.0743 -0.1087)
OKLCH	oklch(44.29% 0.132 304.4)
XYZ	xyz(11.6781, 7.8642, 26.0969)
Luminance	0.0786 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C8D #658D3C

analogous

#3C3C8D #643C8D #8D3C8D

triadic

#643C8D #8D643C #3C8D64

tetradic

#643C8D #8D3C3C #658D3C #3C8D8D

square

#643C8D #8D3C3C #658D3C #3C8D8D

split-complementary

#643C8D #8D8D3C #3C8D3C

monochromatic

#271737 #462A62 #643C8D #8251B5 #A17CC7

Accessibility & contrast

On white

8.16

#643C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#643C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C8D

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C8D	#FFFFFF	#000000	##FFFFFF
##643C8D	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4E90

Deuteranopia (green-blind)

#2C4F8B

Tritanopia (blue-blind)

#5D4C5E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643c8d;
/* rgb */ color: rgb(100, 60, 141);
/* oklch */ color: oklch(44.3% 0.132 304.4);

Tailwind

colors: {
  custom: {
    50: '#9373af',
    500: '#643c8d',
    950: '#000000',
  },
}

SCSS

$custom: #643c8d;
$custom-light: #9373af;
$custom-dark: #000000;

JSON

{
  "hex": "#643c8d",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 141
  },
  "hsl": {
    "h": 269.63,
    "s": 40.299,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44293,
    "c": 0.13168,
    "h": 304.4
  },
  "luminance": 0.07864
}

Semantic roles & 50–950 ramp

primary

#643C8D

secondary

#93B174

accent

#D05895

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643C8D

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

Preview Lab → · Contrast checker → · Palette generator →