#663D99#663D99

#663D99 is a mid, vivid violet. Relative luminance 0.085; OKLCH L 45.5% C 0.146 H 301.4°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#663D99
RGB	rgb(102, 61, 153)
HSL	hsl(267, 43%, 42%)
HSV	hsv(267, 60%, 60%)
CMYK	cmyk(33.3%, 60.1%, 0%, 40%)
CIE-LAB	lab(34.93, 37.42, -43.89)
CIE-LCH	lch(34.93, 57.67, 310.45°)
OKLab	oklab(45.5% 0.0758 -0.1243)
OKLCH	oklch(45.5% 0.146 301.4)
XYZ	xyz(12.8966, 8.4621, 31.0847)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663D99 #70993D

analogous

#3D4299 #663D99 #943D99

triadic

#663D99 #99663D #3D9966

tetradic

#663D99 #993D42 #70993D #3D9994

square

#663D99 #993D42 #70993D #3D9994

split-complementary

#663D99 #99943D #42993D

monochromatic

#2C1A41 #492C6D #663D99 #8457BC #A483CE

Accessibility & contrast

On white

7.80

#663D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#663D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663D99

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663D99	#FFFFFF	#000000	##FFFFFF
##663D99	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D529C

Deuteranopia (green-blind)

#225297

Tritanopia (blue-blind)

#5C5065

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #663d99;
/* rgb */ color: rgb(102, 61, 153);
/* oklch */ color: oklch(45.5% 0.146 301.4);

Tailwind

colors: {
  custom: {
    50: '#9574b8',
    500: '#663d99',
    950: '#000000',
  },
}

SCSS

$custom: #663d99;
$custom-light: #9574b8;
$custom-dark: #000000;

JSON

{
  "hex": "#663d99",
  "rgb": {
    "r": 102,
    "g": 61,
    "b": 153
  },
  "hsl": {
    "h": 266.739,
    "s": 42.991,
    "l": 41.961
  },
  "oklch": {
    "l": 0.45496,
    "c": 0.14561,
    "h": 301.4
  },
  "luminance": 0.08462
}

Semantic roles & 50–950 ramp

primary

#663D99

secondary

#9CB87A

accent

#D3559B

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0E0811

muted

#7E7B80

Preview Lab

Preview with #663D99

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

Preview Lab → · Contrast checker → · Palette generator →