#663B8A#663B8A

#663B8A is a dark, vivid violet. Relative luminance 0.078; OKLCH L 44.2% C 0.130 H 307.0°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#663B8A
RGB	rgb(102, 59, 138)
HSL	hsl(273, 40%, 39%)
HSV	hsv(273, 57%, 54%)
CMYK	cmyk(26.1%, 57.2%, 0%, 45.9%)
CIE-LAB	lab(33.54, 34.71, -36.95)
CIE-LCH	lch(33.54, 50.69, 313.21°)
OKLab	oklab(44.17% 0.0783 -0.104)
OKLCH	oklch(44.17% 0.13 307)
XYZ	xyz(11.6300, 7.7878, 24.9304)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B8A #5F8A3B

analogous

#3E3B8A #663B8A #8A3B86

triadic

#663B8A #8A663B #3B8A66

tetradic

#663B8A #8A3E3B #5F8A3B #3B868A

square

#663B8A #8A3E3B #5F8A3B #3B868A

split-complementary

#663B8A #868A3B #3B8A3E

monochromatic

#271634 #46295F #663B8A #864FB4 #A379C6

Accessibility & contrast

On white

8.21

#663B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#663B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B8A

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B8A	#FFFFFF	#000000	##FFFFFF
##663B8A	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204D8D

Deuteranopia (green-blind)

#2F4F88

Tritanopia (blue-blind)

#604A5C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #663b8a;
/* rgb */ color: rgb(102, 59, 138);
/* oklch */ color: oklch(44.2% 0.130 307.0);

Tailwind

colors: {
  custom: {
    50: '#9473ac',
    500: '#663b8a',
    950: '#000000',
  },
}

SCSS

$custom: #663b8a;
$custom-light: #9473ac;
$custom-dark: #000000;

JSON

{
  "hex": "#663b8a",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 138
  },
  "hsl": {
    "h": 272.658,
    "s": 40.102,
    "l": 38.627
  },
  "oklch": {
    "l": 0.44169,
    "c": 0.13015,
    "h": 307
  },
  "luminance": 0.07788
}

Semantic roles & 50–950 ramp

primary

#663B8A

secondary

#8EAF71

accent

#D0588F

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663B8A

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

Preview Lab → · Contrast checker → · Palette generator →