#643D7A#643D7A

#643D7A is a dark, moderate violet. Relative luminance 0.075; OKLCH L 43.3% C 0.106 H 312.2°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#643D7A
RGB	rgb(100, 61, 122)
HSL	hsl(278, 33%, 36%)
HSV	hsv(278, 50%, 48%)
CMYK	cmyk(18%, 50%, 0%, 52.2%)
CIE-LAB	lab(32.81, 29.02, -28.18)
CIE-LCH	lch(32.81, 40.45, 315.84°)
OKLab	oklab(43.28% 0.0712 -0.0785)
OKLCH	oklch(43.28% 0.106 312.2)
XYZ	xyz(10.4365, 7.4522, 19.2972)
Luminance	0.0745 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D7A #537A3D

analogous

#453D7A #643D7A #7A3D71

triadic

#643D7A #7A643D #3D7A64

tetradic

#643D7A #7A453D #537A3D #3D717A

square

#643D7A #7A453D #537A3D #3D717A

split-complementary

#643D7A #717A3D #3D7A45

monochromatic

#211428 #432951 #643D7A #8551A3 #A277BB

Accessibility & contrast

On white

8.43

#643D7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#643D7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D7A

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D7A	#FFFFFF	#000000	##FFFFFF
##643D7A	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4B7C

Deuteranopia (green-blind)

#3A4E78

Tritanopia (blue-blind)

#624756

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643d7a;
/* rgb */ color: rgb(100, 61, 122);
/* oklch */ color: oklch(43.3% 0.106 312.2);

Tailwind

colors: {
  custom: {
    50: '#9274a1',
    500: '#643d7a',
    950: '#000000',
  },
}

SCSS

$custom: #643d7a;
$custom-light: #9274a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643d7a",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 122
  },
  "hsl": {
    "h": 278.361,
    "s": 33.333,
    "l": 35.882
  },
  "oklch": {
    "l": 0.4328,
    "c": 0.10594,
    "h": 312.2
  },
  "luminance": 0.07452
}

Semantic roles & 50–950 ramp

primary

#643D7A

secondary

#82A56E

accent

#C95E85

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643D7A

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

Preview Lab → · Contrast checker → · Palette generator →