#663C8A#663C8A

#663C8A is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.3% C 0.128 H 306.8°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#663C8A
RGB	rgb(102, 60, 138)
HSL	hsl(272, 39%, 39%)
HSV	hsv(272, 57%, 54%)
CMYK	cmyk(26.1%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(33.76, 34.13, -36.60)
CIE-LCH	lch(33.76, 50.04, 313.00°)
OKLab	oklab(44.33% 0.0769 -0.1029)
OKLCH	oklch(44.33% 0.128 306.8)
XYZ	xyz(11.6818, 7.8916, 24.9476)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663C8A #608A3C

analogous

#3F3C8A #663C8A #8A3C87

triadic

#663C8A #8A663C #3C8A66

tetradic

#663C8A #8A3F3C #608A3C #3C878A

square

#663C8A #8A3F3C #608A3C #3C878A

split-complementary

#663C8A #878A3C #3C8A3F

monochromatic

#271735 #46295F #663C8A #8550B3 #A37BC6

Accessibility & contrast

On white

8.15

#663C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#663C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663C8A

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663C8A	#FFFFFF	#000000	##FFFFFF
##663C8A	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224E8D

Deuteranopia (green-blind)

#305088

Tritanopia (blue-blind)

#604A5D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #663c8a;
/* rgb */ color: rgb(102, 60, 138);
/* oklch */ color: oklch(44.3% 0.128 306.8);

Tailwind

colors: {
  custom: {
    50: '#9473ac',
    500: '#663c8a',
    950: '#000000',
  },
}

SCSS

$custom: #663c8a;
$custom-light: #9473ac;
$custom-dark: #000000;

JSON

{
  "hex": "#663c8a",
  "rgb": {
    "r": 102,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 272.308,
    "s": 39.394,
    "l": 38.824
  },
  "oklch": {
    "l": 0.4433,
    "c": 0.12849,
    "h": 306.8
  },
  "luminance": 0.07891
}

Semantic roles & 50–950 ramp

primary

#663C8A

secondary

#8FAF73

accent

#CF598F

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663C8A

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

Preview Lab → · Contrast checker → · Palette generator →