#643C7A#643C7A

#643C7A is a dark, moderate violet. Relative luminance 0.073; OKLCH L 43.1% C 0.108 H 312.4°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#643C7A
RGB	rgb(100, 60, 122)
HSL	hsl(279, 34%, 36%)
HSV	hsv(279, 51%, 48%)
CMYK	cmyk(18%, 50.8%, 0%, 52.2%)
CIE-LAB	lab(32.58, 29.61, -28.54)
CIE-LCH	lch(32.58, 41.13, 316.05°)
OKLab	oklab(43.11% 0.0727 -0.0795)
OKLCH	oklch(43.11% 0.108 312.4)
XYZ	xyz(10.3836, 7.3464, 19.2796)
Luminance	0.0735 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C7A #527A3C

analogous

#453C7A #643C7A #7A3C71

triadic

#643C7A #7A643C #3C7A64

tetradic

#643C7A #7A453C #527A3C #3C717A

square

#643C7A #7A453C #527A3C #3C717A

split-complementary

#643C7A #717A3C #3C7A45

monochromatic

#211428 #422851 #643C7A #8650A3 #A275BB

Accessibility & contrast

On white

8.50

#643C7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#643C7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C7A

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C7A	#FFFFFF	#000000	##FFFFFF
##643C7A	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4B7C

Deuteranopia (green-blind)

#394E78

Tritanopia (blue-blind)

#624655

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643c7a;
/* rgb */ color: rgb(100, 60, 122);
/* oklch */ color: oklch(43.1% 0.108 312.4);

Tailwind

colors: {
  custom: {
    50: '#9273a1',
    500: '#643c7a',
    950: '#000000',
  },
}

SCSS

$custom: #643c7a;
$custom-light: #9273a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643c7a",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 122
  },
  "hsl": {
    "h": 278.71,
    "s": 34.066,
    "l": 35.686
  },
  "oklch": {
    "l": 0.43107,
    "c": 0.10775,
    "h": 312.4
  },
  "luminance": 0.07346
}

Semantic roles & 50–950 ramp

primary

#643C7A

secondary

#81A56D

accent

#CA5E84

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643C7A

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

Preview Lab → · Contrast checker → · Palette generator →