#643C8C#643C8C

#643C8C is a dark, vivid violet. Relative luminance 0.078; OKLCH L 44.2% C 0.130 H 304.7°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#643C8C
RGB	rgb(100, 60, 140)
HSL	hsl(270, 40%, 39%)
HSV	hsv(270, 57%, 55%)
CMYK	cmyk(28.6%, 57.1%, 0%, 45.1%)
CIE-LAB	lab(33.64, 34.10, -38.03)
CIE-LCH	lch(33.64, 51.08, 311.88°)
OKLab	oklab(44.23% 0.0743 -0.1072)
OKLCH	oklch(44.23% 0.13 304.7)
XYZ	xyz(11.6040, 7.8345, 25.7068)
Luminance	0.0783 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C8C #648C3C

analogous

#3C3C8C #643C8C #8C3C8C

triadic

#643C8C #8C643C #3C8C64

tetradic

#643C8C #8C3C3C #648C3C #3C8C8C

square

#643C8C #8C3C3C #648C3C #3C8C8C

split-complementary

#643C8C #8C8C3C #3C8C3C

monochromatic

#271736 #452A61 #643C8C #8351B4 #A17CC7

Accessibility & contrast

On white

8.18

#643C8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#643C8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C8C

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C8C	#FFFFFF	#000000	##FFFFFF
##643C8C	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4E8F

Deuteranopia (green-blind)

#2D4F8A

Tritanopia (blue-blind)

#5D4B5E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643c8c;
/* rgb */ color: rgb(100, 60, 140);
/* oklch */ color: oklch(44.2% 0.130 304.7);

Tailwind

colors: {
  custom: {
    50: '#9373ae',
    500: '#643c8c',
    950: '#000000',
  },
}

SCSS

$custom: #643c8c;
$custom-light: #9373ae;
$custom-dark: #000000;

JSON

{
  "hex": "#643c8c",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 140
  },
  "hsl": {
    "h": 270,
    "s": 40,
    "l": 39.216
  },
  "oklch": {
    "l": 0.44227,
    "c": 0.13041,
    "h": 304.7
  },
  "luminance": 0.07834
}

Semantic roles & 50–950 ramp

primary

#643C8C

secondary

#92B073

accent

#D05894

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643C8C

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

Preview Lab → · Contrast checker → · Palette generator →