#663C8D#663C8D

#663C8D is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.5% C 0.132 H 305.6°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#663C8D
RGB	rgb(102, 60, 141)
HSL	hsl(271, 40%, 39%)
HSV	hsv(271, 57%, 55%)
CMYK	cmyk(27.7%, 57.4%, 0%, 44.7%)
CIE-LAB	lab(33.94, 34.89, -38.15)
CIE-LCH	lch(33.94, 51.69, 312.44°)
OKLab	oklab(44.53% 0.077 -0.1075)
OKLCH	oklch(44.53% 0.132 305.6)
XYZ	xyz(11.9020, 7.9797, 26.1074)
Luminance	0.0798 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663C8D #638D3C

analogous

#3D3C8D #663C8D #8D3C8C

triadic

#663C8D #8D663C #3C8D66

tetradic

#663C8D #8D3D3C #638D3C #3C8C8D

square

#663C8D #8D3D3C #638D3C #3C8C8D

split-complementary

#663C8D #8C8D3C #3C8D3D

monochromatic

#281737 #472A62 #663C8D #8551B5 #A37CC7

Accessibility & contrast

On white

8.09

#663C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#663C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663C8D

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663C8D	#FFFFFF	#000000	##FFFFFF
##663C8D	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4E90

Deuteranopia (green-blind)

#2E508B

Tritanopia (blue-blind)

#604B5E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #663c8d;
/* rgb */ color: rgb(102, 60, 141);
/* oklch */ color: oklch(44.5% 0.132 305.6);

Tailwind

colors: {
  custom: {
    50: '#9473af',
    500: '#663c8d',
    950: '#000000',
  },
}

SCSS

$custom: #663c8d;
$custom-light: #9473af;
$custom-dark: #000000;

JSON

{
  "hex": "#663c8d",
  "rgb": {
    "r": 102,
    "g": 60,
    "b": 141
  },
  "hsl": {
    "h": 271.111,
    "s": 40.299,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44525,
    "c": 0.13222,
    "h": 305.6
  },
  "luminance": 0.0798
}

Semantic roles & 50–950 ramp

primary

#663C8D

secondary

#91B174

accent

#D05892

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663C8D

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

Preview Lab → · Contrast checker → · Palette generator →