#663A8D#663A8D

#663A8D is a dark, vivid violet. Relative luminance 0.078; OKLCH L 44.2% C 0.135 H 306.1°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#663A8D
RGB	rgb(102, 58, 141)
HSL	hsl(272, 42%, 39%)
HSV	hsv(272, 59%, 55%)
CMYK	cmyk(27.7%, 58.9%, 0%, 44.7%)
CIE-LAB	lab(33.51, 36.03, -38.84)
CIE-LCH	lch(33.51, 52.98, 312.85°)
OKLab	oklab(44.21% 0.0798 -0.1095)
OKLCH	oklch(44.21% 0.135 306.1)
XYZ	xyz(11.7992, 7.7741, 26.0731)
Luminance	0.0777 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663A8D #618D3A

analogous

#3C3A8D #663A8D #8D3A8B

triadic

#663A8D #8D663A #3A8D66

tetradic

#663A8D #8D3C3A #618D3A #3A8B8D

square

#663A8D #8D3C3A #618D3A #3A8B8D

split-complementary

#663A8D #8B8D3A #3A8D3C

monochromatic

#271636 #472862 #663A8D #854EB6 #A379C8

Accessibility & contrast

On white

8.22

#663A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#663A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663A8D

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663A8D	#FFFFFF	#000000	##FFFFFF
##663A8D	1.00	8.22	2.55	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4D90

Deuteranopia (green-blind)

#2B4F8B

Tritanopia (blue-blind)

#604A5E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #663a8d;
/* rgb */ color: rgb(102, 58, 141);
/* oklch */ color: oklch(44.2% 0.135 306.1);

Tailwind

colors: {
  custom: {
    50: '#9472af',
    500: '#663a8d',
    950: '#000000',
  },
}

SCSS

$custom: #663a8d;
$custom-light: #9472af;
$custom-dark: #000000;

JSON

{
  "hex": "#663a8d",
  "rgb": {
    "r": 102,
    "g": 58,
    "b": 141
  },
  "hsl": {
    "h": 271.807,
    "s": 41.709,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44208,
    "c": 0.13547,
    "h": 306.1
  },
  "luminance": 0.07774
}

Semantic roles & 50–950 ramp

primary

#663A8D

secondary

#8FB171

accent

#D25690

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663A8D

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

Preview Lab → · Contrast checker → · Palette generator →