#643B78#643B78

#643B78 is a dark, moderate purple. Relative luminance 0.072; OKLCH L 42.8% C 0.107 H 313.7°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#643B78
RGB	rgb(100, 59, 120)
HSL	hsl(280, 34%, 35%)
HSV	hsv(280, 51%, 47%)
CMYK	cmyk(16.7%, 50.8%, 0%, 52.9%)
CIE-LAB	lab(32.24, 29.73, -27.83)
CIE-LCH	lch(32.24, 40.72, 316.89°)
OKLab	oklab(42.82% 0.074 -0.0774)
OKLCH	oklch(42.82% 0.107 313.7)
XYZ	xyz(10.2091, 7.1936, 18.6164)
Luminance	0.0719 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B78 #4F783B

analogous

#463B78 #643B78 #783B6D

triadic

#643B78 #78643B #3B7864

tetradic

#643B78 #78463B #4F783B #3B6D78

square

#643B78 #78463B #4F783B #3B6D78

split-complementary

#643B78 #6D783B #3B7846

monochromatic

#201326 #42274F #643B78 #864FA1 #A373BA

Accessibility & contrast

On white

8.61

#643B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#643B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B78

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B78	#FFFFFF	#000000	##FFFFFF
##643B78	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4A7A

Deuteranopia (green-blind)

#3A4D76

Tritanopia (blue-blind)

#624454

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643b78;
/* rgb */ color: rgb(100, 59, 120);
/* oklch */ color: oklch(42.8% 0.107 313.7);

Tailwind

colors: {
  custom: {
    50: '#92729f',
    500: '#643b78',
    950: '#000000',
  },
}

SCSS

$custom: #643b78;
$custom-light: #92729f;
$custom-dark: #000000;

JSON

{
  "hex": "#643b78",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 120
  },
  "hsl": {
    "h": 280.328,
    "s": 34.078,
    "l": 35.098
  },
  "oklch": {
    "l": 0.4282,
    "c": 0.10709,
    "h": 313.7
  },
  "luminance": 0.07193
}

Semantic roles & 50–950 ramp

primary

#643B78

secondary

#7EA46B

accent

#CA5E81

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643B78

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

Preview Lab → · Contrast checker → · Palette generator →