#663B9E#663B9E

#663B9E is a mid, vivid violet. Relative luminance 0.084; OKLCH L 45.5% C 0.155 H 300.3°. Best body text is #FFFFFF at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#663B9E
RGB	rgb(102, 59, 158)
HSL	hsl(266, 46%, 43%)
HSV	hsv(266, 63%, 62%)
CMYK	cmyk(35.4%, 62.7%, 0%, 38%)
CIE-LAB	lab(34.85, 39.86, -47.04)
CIE-LCH	lch(34.85, 61.66, 310.27°)
OKLab	oklab(45.54% 0.0782 -0.1336)
OKLCH	oklch(45.54% 0.155 300.3)
XYZ	xyz(13.2135, 8.4212, 33.2704)
Luminance	0.0842 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B9E #739E3B

analogous

#3B419E #663B9E #983B9E

triadic

#663B9E #9E663B #3B9E66

tetradic

#663B9E #9E3B41 #739E3B #3B9E98

square

#663B9E #9E3B41 #739E3B #3B9E98

split-complementary

#663B9E #9E983B #419E3B

monochromatic

#2C1A45 #492A71 #663B9E #8456C0 #A583D1

Accessibility & contrast

On white

7.82

#663B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#663B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B9E

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B9E	#FFFFFF	#000000	##FFFFFF
##663B9E	1.00	7.82	2.68	7.82
#FFFFFF	7.82	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A1

Deuteranopia (green-blind)

#17519C

Tritanopia (blue-blind)

#5A5067

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #663b9e;
/* rgb */ color: rgb(102, 59, 158);
/* oklch */ color: oklch(45.5% 0.155 300.3);

Tailwind

colors: {
  custom: {
    50: '#9673bb',
    500: '#663b9e',
    950: '#000000',
  },
}

SCSS

$custom: #663b9e;
$custom-light: #9673bb;
$custom-dark: #000000;

JSON

{
  "hex": "#663b9e",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 158
  },
  "hsl": {
    "h": 266.061,
    "s": 45.622,
    "l": 42.549
  },
  "oklch": {
    "l": 0.45544,
    "c": 0.15477,
    "h": 300.3
  },
  "luminance": 0.08421
}

Semantic roles & 50–950 ramp

primary

#663B9E

secondary

#9FBB7A

accent

#D5539C

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0E0812

muted

#7E7B81

Preview Lab

Preview with #663B9E

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

Preview Lab → · Contrast checker → · Palette generator →