#643D8D#643D8D

#643D8D is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.5% C 0.130 H 304.1°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#643D8D
RGB	rgb(100, 61, 141)
HSL	hsl(269, 40%, 40%)
HSV	hsv(269, 57%, 55%)
CMYK	cmyk(29.1%, 56.7%, 0%, 44.7%)
CIE-LAB	lab(33.92, 33.77, -38.19)
CIE-LCH	lch(33.92, 50.98, 311.48°)
OKLab	oklab(44.46% 0.0729 -0.1077)
OKLCH	oklch(44.46% 0.13 304.1)
XYZ	xyz(11.7309, 7.9699, 26.1145)
Luminance	0.0797 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D8D #668D3D

analogous

#3D3E8D #643D8D #8C3D8D

triadic

#643D8D #8D643D #3D8D64

tetradic

#643D8D #8D3D3E #668D3D #3D8D8C

square

#643D8D #8D3D3E #668D3D #3D8D8C

split-complementary

#643D8D #8D8C3D #3E8D3D

monochromatic

#271838 #462B62 #643D8D #8253B4 #A17DC7

Accessibility & contrast

On white

8.10

#643D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#643D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D8D

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D8D	#FFFFFF	#000000	##FFFFFF
##643D8D	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4F90

Deuteranopia (green-blind)

#2D508B

Tritanopia (blue-blind)

#5D4C5F

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643d8d;
/* rgb */ color: rgb(100, 61, 141);
/* oklch */ color: oklch(44.5% 0.130 304.1);

Tailwind

colors: {
  custom: {
    50: '#9374af',
    500: '#643d8d',
    950: '#000000',
  },
}

SCSS

$custom: #643d8d;
$custom-light: #9374af;
$custom-dark: #000000;

JSON

{
  "hex": "#643d8d",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 141
  },
  "hsl": {
    "h": 269.25,
    "s": 39.604,
    "l": 39.608
  },
  "oklch": {
    "l": 0.44456,
    "c": 0.13004,
    "h": 304.1
  },
  "luminance": 0.0797
}

Semantic roles & 50–950 ramp

primary

#643D8D

secondary

#94B175

accent

#CF5895

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643D8D

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

Preview Lab → · Contrast checker → · Palette generator →