#663E8D#663E8D

#663E8D is a dark, vivid violet. Relative luminance 0.082; OKLCH L 44.9% C 0.129 H 305.2°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#663E8D
RGB	rgb(102, 62, 141)
HSL	hsl(270, 39%, 40%)
HSV	hsv(270, 56%, 55%)
CMYK	cmyk(27.7%, 56%, 0%, 44.7%)
CIE-LAB	lab(34.38, 33.73, -37.44)
CIE-LCH	lch(34.38, 50.39, 312.02°)
OKLab	oklab(44.85% 0.0743 -0.1054)
OKLCH	oklch(44.85% 0.129 305.2)
XYZ	xyz(12.0088, 8.1932, 26.1429)
Luminance	0.0819 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663E8D #658D3E

analogous

#3F3E8D #663E8D #8D3E8C

triadic

#663E8D #8D663E #3E8D66

tetradic

#663E8D #8D3F3E #658D3E #3E8C8D

square

#663E8D #8D3F3E #658D3E #3E8C8D

split-complementary

#663E8D #8C8D3E #3E8D3F

monochromatic

#281938 #472B62 #663E8D #8554B4 #A37FC7

Accessibility & contrast

On white

7.96

#663E8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#663E8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663E8D

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663E8D	#FFFFFF	#000000	##FFFFFF
##663E8D	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#225090

Deuteranopia (green-blind)

#30518B

Tritanopia (blue-blind)

#5F4D5F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #663e8d;
/* rgb */ color: rgb(102, 62, 141);
/* oklch */ color: oklch(44.9% 0.129 305.2);

Tailwind

colors: {
  custom: {
    50: '#9475af',
    500: '#663e8d',
    950: '#000000',
  },
}

SCSS

$custom: #663e8d;
$custom-light: #9475af;
$custom-dark: #000000;

JSON

{
  "hex": "#663e8d",
  "rgb": {
    "r": 102,
    "g": 62,
    "b": 141
  },
  "hsl": {
    "h": 270.38,
    "s": 38.916,
    "l": 39.804
  },
  "oklch": {
    "l": 0.4485,
    "c": 0.12895,
    "h": 305.2
  },
  "luminance": 0.08193
}

Semantic roles & 50–950 ramp

primary

#663E8D

secondary

#93B176

accent

#CF5993

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663E8D

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

Preview Lab → · Contrast checker → · Palette generator →