#663B9D#663B9D

#663B9D is a mid, vivid violet. Relative luminance 0.084; OKLCH L 45.5% C 0.154 H 300.6°. Best body text is #FFFFFF at 7.84:1 contrast (WCAG AA passes).

Color values

HEX	#663B9D
RGB	rgb(102, 59, 157)
HSL	hsl(266, 45%, 42%)
HSV	hsv(266, 62%, 62%)
CMYK	cmyk(35%, 62.4%, 0%, 38.4%)
CIE-LAB	lab(34.78, 39.59, -46.55)
CIE-LCH	lch(34.78, 61.11, 310.38°)
OKLab	oklab(45.47% 0.0782 -0.1321)
OKLCH	oklch(45.47% 0.154 300.6)
XYZ	xyz(13.1278, 8.3869, 32.8190)
Luminance	0.0839 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B9D #729D3B

analogous

#3B419D #663B9D #973B9D

triadic

#663B9D #9D663B #3B9D66

tetradic

#663B9D #9D3B41 #729D3B #3B9D97

square

#663B9D #9D3B41 #729D3B #3B9D97

split-complementary

#663B9D #9D973B #419D3B

monochromatic

#2C1A44 #492A71 #663B9D #8456BF #A482D0

Accessibility & contrast

On white

7.84

#663B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#663B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B9D

7.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B9D	#FFFFFF	#000000	##FFFFFF
##663B9D	1.00	7.84	2.68	7.84
#FFFFFF	7.84	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A0

Deuteranopia (green-blind)

#19519B

Tritanopia (blue-blind)

#5A5066

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #663b9d;
/* rgb */ color: rgb(102, 59, 157);
/* oklch */ color: oklch(45.5% 0.154 300.6);

Tailwind

colors: {
  custom: {
    50: '#9673bb',
    500: '#663b9d',
    950: '#000000',
  },
}

SCSS

$custom: #663b9d;
$custom-light: #9673bb;
$custom-dark: #000000;

JSON

{
  "hex": "#663b9d",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 157
  },
  "hsl": {
    "h": 266.327,
    "s": 45.37,
    "l": 42.353
  },
  "oklch": {
    "l": 0.45472,
    "c": 0.15356,
    "h": 300.6
  },
  "luminance": 0.08387
}

Semantic roles & 50–950 ramp

primary

#663B9D

secondary

#9EBA7A

accent

#D5539C

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0E0812

muted

#7E7B81

Preview Lab

Preview with #663B9D

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

Preview Lab → · Contrast checker → · Palette generator →