#663D8A#663D8A

#663D8A is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.5% C 0.127 H 306.5°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#663D8A
RGB	rgb(102, 61, 138)
HSL	hsl(272, 39%, 39%)
HSV	hsv(272, 56%, 54%)
CMYK	cmyk(26.1%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(33.98, 33.55, -36.24)
CIE-LCH	lch(33.98, 49.39, 312.79°)
OKLab	oklab(44.49% 0.0755 -0.1019)
OKLCH	oklch(44.49% 0.127 306.5)
XYZ	xyz(11.7347, 7.9974, 24.9653)
Luminance	0.0800 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663D8A #618A3D

analogous

#403D8A #663D8A #8A3D88

triadic

#663D8A #8A663D #3D8A66

tetradic

#663D8A #8A403D #618A3D #3D888A

square

#663D8A #8A403D #618A3D #3D888A

split-complementary

#663D8A #888A3D #3D8A40

monochromatic

#271735 #472A60 #663D8A #8552B2 #A37CC5

Accessibility & contrast

On white

8.08

#663D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#663D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663D8A

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663D8A	#FFFFFF	#000000	##FFFFFF
##663D8A	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244E8D

Deuteranopia (green-blind)

#315088

Tritanopia (blue-blind)

#604B5D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #663d8a;
/* rgb */ color: rgb(102, 61, 138);
/* oklch */ color: oklch(44.5% 0.127 306.5);

Tailwind

colors: {
  custom: {
    50: '#9474ac',
    500: '#663d8a',
    950: '#000000',
  },
}

SCSS

$custom: #663d8a;
$custom-light: #9474ac;
$custom-dark: #000000;

JSON

{
  "hex": "#663d8a",
  "rgb": {
    "r": 102,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 271.948,
    "s": 38.693,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44493,
    "c": 0.12683,
    "h": 306.5
  },
  "luminance": 0.07997
}

Semantic roles & 50–950 ramp

primary

#663D8A

secondary

#8FAF74

accent

#CF5990

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663D8A

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

Preview Lab → · Contrast checker → · Palette generator →