#643C78#643C78

#643C78 is a dark, moderate purple. Relative luminance 0.073; OKLCH L 43.0% C 0.105 H 313.5°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#643C78
RGB	rgb(100, 60, 120)
HSL	hsl(280, 33%, 35%)
HSV	hsv(280, 50%, 47%)
CMYK	cmyk(16.7%, 50%, 0%, 52.9%)
CIE-LAB	lab(32.47, 29.14, -27.46)
CIE-LCH	lch(32.47, 40.04, 316.69°)
OKLab	oklab(42.99% 0.0724 -0.0764)
OKLCH	oklch(42.99% 0.105 313.5)
XYZ	xyz(10.2610, 7.2974, 18.6337)
Luminance	0.0730 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C78 #50783C

analogous

#463C78 #643C78 #783C6E

triadic

#643C78 #78643C #3C7864

tetradic

#643C78 #78463C #50783C #3C6E78

square

#643C78 #78463C #50783C #3C6E78

split-complementary

#643C78 #6E783C #3C7846

monochromatic

#201326 #42284F #643C78 #8650A1 #A375BA

Accessibility & contrast

On white

8.54

#643C78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#643C78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C78

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C78	#FFFFFF	#000000	##FFFFFF
##643C78	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4A7A

Deuteranopia (green-blind)

#3A4D76

Tritanopia (blue-blind)

#624554

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643c78;
/* rgb */ color: rgb(100, 60, 120);
/* oklch */ color: oklch(43.0% 0.105 313.5);

Tailwind

colors: {
  custom: {
    50: '#92739f',
    500: '#643c78',
    950: '#000000',
  },
}

SCSS

$custom: #643c78;
$custom-light: #92739f;
$custom-dark: #000000;

JSON

{
  "hex": "#643c78",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 120
  },
  "hsl": {
    "h": 280,
    "s": 33.333,
    "l": 35.294
  },
  "oklch": {
    "l": 0.42991,
    "c": 0.10527,
    "h": 313.5
  },
  "luminance": 0.07297
}

Semantic roles & 50–950 ramp

primary

#643C78

secondary

#7FA46C

accent

#C95E82

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643C78

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

Preview Lab → · Contrast checker → · Palette generator →