#643F78#643F78

#643F78 is a dark, moderate violet. Relative luminance 0.076; OKLCH L 43.5% C 0.100 H 312.8°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#643F78
RGB	rgb(100, 63, 120)
HSL	hsl(279, 31%, 36%)
HSV	hsv(279, 48%, 47%)
CMYK	cmyk(16.7%, 47.5%, 0%, 52.9%)
CIE-LAB	lab(33.18, 27.34, -26.35)
CIE-LCH	lch(33.18, 37.97, 316.05°)
OKLab	oklab(43.52% 0.0678 -0.0732)
OKLCH	oklch(43.52% 0.1 312.8)
XYZ	xyz(10.4226, 7.6206, 18.6875)
Luminance	0.0762 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F78 #53783F

analogous

#473F78 #643F78 #783F6F

triadic

#643F78 #78643F #3F7864

tetradic

#643F78 #78473F #53783F #3F6F78

square

#643F78 #78473F #53783F #3F6F78

split-complementary

#643F78 #6F783F #3F7847

monochromatic

#211528 #432A50 #643F78 #8554A0 #A279B9

Accessibility & contrast

On white

8.32

#643F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#643F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F78

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F78	#FFFFFF	#000000	##FFFFFF
##643F78	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334C7A

Deuteranopia (green-blind)

#3D4F76

Tritanopia (blue-blind)

#624856

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643f78;
/* rgb */ color: rgb(100, 63, 120);
/* oklch */ color: oklch(43.5% 0.100 312.8);

Tailwind

colors: {
  custom: {
    50: '#91759f',
    500: '#643f78',
    950: '#000000',
  },
}

SCSS

$custom: #643f78;
$custom-light: #91759f;
$custom-dark: #000000;

JSON

{
  "hex": "#643f78",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 120
  },
  "hsl": {
    "h": 278.947,
    "s": 31.148,
    "l": 35.882
  },
  "oklch": {
    "l": 0.43517,
    "c": 0.09973,
    "h": 312.8
  },
  "luminance": 0.0762
}

Semantic roles & 50–950 ramp

primary

#643F78

secondary

#82A370

accent

#C76085

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643F78

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

Preview Lab → · Contrast checker → · Palette generator →