#663B92#663B92

#663B92 is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.7% C 0.140 H 304.1°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#663B92
RGB	rgb(102, 59, 146)
HSL	hsl(270, 42%, 40%)
HSV	hsv(270, 60%, 57%)
CMYK	cmyk(30.1%, 59.6%, 0%, 42.7%)
CIE-LAB	lab(34.04, 36.73, -41.05)
CIE-LCH	lch(34.04, 55.08, 311.83°)
OKLab	oklab(44.7% 0.0785 -0.116)
OKLCH	oklch(44.7% 0.14 304.1)
XYZ	xyz(12.2306, 8.0281, 28.0938)
Luminance	0.0803 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B92 #67923B

analogous

#3B3C92 #663B92 #913B92

triadic

#663B92 #92663B #3B9266

tetradic

#663B92 #923B3C #67923B #3B9291

square

#663B92 #923B3C #67923B #3B9291

split-complementary

#663B92 #92913B #3C923B

monochromatic

#29183B #482966 #663B92 #8551B9 #A37DCA

Accessibility & contrast

On white

8.06

#663B92 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#663B92 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B92

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B92	#FFFFFF	#000000	##FFFFFF
##663B92	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154F95

Deuteranopia (green-blind)

#285090

Tritanopia (blue-blind)

#5E4C60

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #663b92;
/* rgb */ color: rgb(102, 59, 146);
/* oklch */ color: oklch(44.7% 0.140 304.1);

Tailwind

colors: {
  custom: {
    50: '#9573b2',
    500: '#663b92',
    950: '#000000',
  },
}

SCSS

$custom: #663b92;
$custom-light: #9573b2;
$custom-dark: #000000;

JSON

{
  "hex": "#663b92",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 146
  },
  "hsl": {
    "h": 269.655,
    "s": 42.439,
    "l": 40.196
  },
  "oklch": {
    "l": 0.44701,
    "c": 0.14003,
    "h": 304.1
  },
  "luminance": 0.08028
}

Semantic roles & 50–950 ramp

primary

#663B92

secondary

#95B475

accent

#D25695

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #663B92

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

Preview Lab → · Contrast checker → · Palette generator →