#643D78#643D78

#643D78 is a dark, moderate violet. Relative luminance 0.074; OKLCH L 43.2% C 0.103 H 313.3°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#643D78
RGB	rgb(100, 61, 120)
HSL	hsl(280, 33%, 35%)
HSV	hsv(280, 49%, 47%)
CMYK	cmyk(16.7%, 49.2%, 0%, 52.9%)
CIE-LAB	lab(32.71, 28.54, -27.10)
CIE-LCH	lch(32.71, 39.35, 316.49°)
OKLab	oklab(43.17% 0.0709 -0.0753)
OKLCH	oklch(43.17% 0.103 313.3)
XYZ	xyz(10.3139, 7.4031, 18.6513)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D78 #51783D

analogous

#463D78 #643D78 #783D6E

triadic

#643D78 #78643D #3D7864

tetradic

#643D78 #78463D #51783D #3D6E78

square

#643D78 #78463D #51783D #3D6E78

split-complementary

#643D78 #6E783D #3D7846

monochromatic

#201427 #42284F #643D78 #8652A1 #A376B9

Accessibility & contrast

On white

8.47

#643D78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#643D78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D78

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D78	#FFFFFF	#000000	##FFFFFF
##643D78	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304B7A

Deuteranopia (green-blind)

#3B4E76

Tritanopia (blue-blind)

#624655

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643d78;
/* rgb */ color: rgb(100, 61, 120);
/* oklch */ color: oklch(43.2% 0.103 313.3);

Tailwind

colors: {
  custom: {
    50: '#91749f',
    500: '#643d78',
    950: '#000000',
  },
}

SCSS

$custom: #643d78;
$custom-light: #91749f;
$custom-dark: #000000;

JSON

{
  "hex": "#643d78",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 120
  },
  "hsl": {
    "h": 279.661,
    "s": 32.597,
    "l": 35.49
  },
  "oklch": {
    "l": 0.43165,
    "c": 0.10343,
    "h": 313.3
  },
  "luminance": 0.07403
}

Semantic roles & 50–950 ramp

primary

#643D78

secondary

#80A36D

accent

#C95F83

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643D78

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

Preview Lab → · Contrast checker → · Palette generator →