#663B8D#663B8D

#663B8D is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.4% C 0.134 H 305.9°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#663B8D
RGB	rgb(102, 59, 141)
HSL	hsl(271, 41%, 39%)
HSV	hsv(271, 58%, 55%)
CMYK	cmyk(27.7%, 58.2%, 0%, 44.7%)
CIE-LAB	lab(33.72, 35.46, -38.49)
CIE-LCH	lch(33.72, 52.34, 312.65°)
OKLab	oklab(44.37% 0.0784 -0.1085)
OKLCH	oklch(44.37% 0.134 305.9)
XYZ	xyz(11.8502, 7.8759, 26.0901)
Luminance	0.0788 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B8D #628D3B

analogous

#3D3B8D #663B8D #8D3B8B

triadic

#663B8D #8D663B #3B8D66

tetradic

#663B8D #8D3D3B #628D3B #3B8B8D

square

#663B8D #8D3D3B #628D3B #3B8B8D

split-complementary

#663B8D #8B8D3B #3B8D3D

monochromatic

#281737 #472962 #663B8D #8550B6 #A37BC8

Accessibility & contrast

On white

8.15

#663B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#663B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B8D

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B8D	#FFFFFF	#000000	##FFFFFF
##663B8D	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4E90

Deuteranopia (green-blind)

#2D508B

Tritanopia (blue-blind)

#604B5E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #663b8d;
/* rgb */ color: rgb(102, 59, 141);
/* oklch */ color: oklch(44.4% 0.134 305.9);

Tailwind

colors: {
  custom: {
    50: '#9473af',
    500: '#663b8d',
    950: '#000000',
  },
}

SCSS

$custom: #663b8d;
$custom-light: #9473af;
$custom-dark: #000000;

JSON

{
  "hex": "#663b8d",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 141
  },
  "hsl": {
    "h": 271.463,
    "s": 41,
    "l": 39.216
  },
  "oklch": {
    "l": 0.44366,
    "c": 0.13386,
    "h": 305.9
  },
  "luminance": 0.07876
}

Semantic roles & 50–950 ramp

primary

#663B8D

secondary

#90B173

accent

#D15791

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663B8D

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

Preview Lab → · Contrast checker → · Palette generator →