#663B78#663B78

#663B78 is a dark, moderate purple. Relative luminance 0.073; OKLCH L 43.1% C 0.108 H 315.2°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#663B78
RGB	rgb(102, 59, 120)
HSL	hsl(282, 34%, 35%)
HSV	hsv(282, 51%, 47%)
CMYK	cmyk(15%, 50.8%, 0%, 52.9%)
CIE-LAB	lab(32.50, 30.35, -27.40)
CIE-LCH	lch(32.50, 40.89, 317.92°)
OKLab	oklab(43.07% 0.0766 -0.0762)
OKLCH	oklch(43.07% 0.108 315.2)
XYZ	xyz(10.4331, 7.3091, 18.6269)
Luminance	0.0731 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B78 #4D783B

analogous

#473B78 #663B78 #783B6B

triadic

#663B78 #78663B #3B7866

tetradic

#663B78 #78473B #4D783B #3B6B78

square

#663B78 #78473B #4D783B #3B6B78

split-complementary

#663B78 #6B783B #3B7847

monochromatic

#201326 #43274F #663B78 #894FA1 #A573BA

Accessibility & contrast

On white

8.53

#663B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#663B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B78

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B78	#FFFFFF	#000000	##FFFFFF
##663B78	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4A7A

Deuteranopia (green-blind)

#3B4E76

Tritanopia (blue-blind)

#654454

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #663b78;
/* rgb */ color: rgb(102, 59, 120);
/* oklch */ color: oklch(43.1% 0.108 315.2);

Tailwind

colors: {
  custom: {
    50: '#93729f',
    500: '#663b78',
    950: '#000000',
  },
}

SCSS

$custom: #663b78;
$custom-light: #93729f;
$custom-dark: #000000;

JSON

{
  "hex": "#663b78",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 120
  },
  "hsl": {
    "h": 282.295,
    "s": 34.078,
    "l": 35.098
  },
  "oklch": {
    "l": 0.43067,
    "c": 0.10805,
    "h": 315.2
  },
  "luminance": 0.07309
}

Semantic roles & 50–950 ramp

primary

#663B78

secondary

#7CA46B

accent

#CA5E7E

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #663B78

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

Preview Lab → · Contrast checker → · Palette generator →