#643E78#643E78

#643E78 is a dark, moderate violet. Relative luminance 0.075; OKLCH L 43.3% C 0.102 H 313.0°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#643E78
RGB	rgb(100, 62, 120)
HSL	hsl(279, 32%, 36%)
HSV	hsv(279, 48%, 47%)
CMYK	cmyk(16.7%, 48.3%, 0%, 52.9%)
CIE-LAB	lab(32.94, 27.94, -26.73)
CIE-LCH	lch(32.94, 38.66, 316.27°)
OKLab	oklab(43.34% 0.0693 -0.0743)
OKLCH	oklch(43.34% 0.102 313)
XYZ	xyz(10.3677, 7.5109, 18.6692)
Luminance	0.0751 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E78 #52783E

analogous

#473E78 #643E78 #783E6F

triadic

#643E78 #78643E #3E7864

tetradic

#643E78 #78473E #52783E #3E6F78

square

#643E78 #78473E #52783E #3E6F78

split-complementary

#643E78 #6F783E #3E7847

monochromatic

#211427 #422950 #643E78 #8653A0 #A277B9

Accessibility & contrast

On white

8.39

#643E78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#643E78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E78

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E78	#FFFFFF	#000000	##FFFFFF
##643E78	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#324B7A

Deuteranopia (green-blind)

#3C4E76

Tritanopia (blue-blind)

#624755

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643e78;
/* rgb */ color: rgb(100, 62, 120);
/* oklch */ color: oklch(43.3% 0.102 313.0);

Tailwind

colors: {
  custom: {
    50: '#91749f',
    500: '#643e78',
    950: '#000000',
  },
}

SCSS

$custom: #643e78;
$custom-light: #91749f;
$custom-dark: #000000;

JSON

{
  "hex": "#643e78",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 120
  },
  "hsl": {
    "h": 279.31,
    "s": 31.868,
    "l": 35.686
  },
  "oklch": {
    "l": 0.4334,
    "c": 0.10159,
    "h": 313
  },
  "luminance": 0.07511
}

Semantic roles & 50–950 ramp

primary

#643E78

secondary

#81A36F

accent

#C86084

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643E78

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

Preview Lab → · Contrast checker → · Palette generator →