#66178B#66178B

#66178B is a dark, vivid purple. Relative luminance 0.053; OKLCH L 39.9% C 0.179 H 311.5°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#66178B
RGB	rgb(102, 23, 139)
HSL	hsl(281, 72%, 32%)
HSV	hsv(281, 83%, 55%)
CMYK	cmyk(26.6%, 83.5%, 0%, 45.5%)
CIE-LAB	lab(27.58, 51.66, -47.16)
CIE-LCH	lch(27.58, 69.95, 317.61°)
OKLab	oklab(39.92% 0.1185 -0.1337)
OKLCH	oklch(39.92% 0.179 311.5)
XYZ	xyz(10.4452, 5.3019, 24.8942)
Luminance	0.0530 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Royal Purple (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66178B #3C8B17

analogous

#2C178B #66178B #8B1776

triadic

#66178B #8B6617 #178B66

tetradic

#66178B #8B2C17 #3C8B17 #17768B

square

#66178B #8B2C17 #3C8B17 #17768B

split-complementary

#66178B #768B17 #178B2C

monochromatic

#190622 #3F0E56 #66178B #8D20C0 #AB3DDF

Accessibility & contrast

On white

10.19

#66178B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#66178B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66178B

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66178B	#FFFFFF	#000000	##FFFFFF
##66178B	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E8E

Deuteranopia (green-blind)

#004289

Tritanopia (blue-blind)

#613552

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #66178b;
/* rgb */ color: rgb(102, 23, 139);
/* oklch */ color: oklch(39.9% 0.179 311.5);

Tailwind

colors: {
  custom: {
    50: '#9660ae',
    500: '#66178b',
    950: '#000000',
  },
}

SCSS

$custom: #66178b;
$custom-light: #9660ae;
$custom-dark: #000000;

JSON

{
  "hex": "#66178b",
  "rgb": {
    "r": 102,
    "g": 23,
    "b": 139
  },
  "hsl": {
    "h": 280.862,
    "s": 71.605,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39915,
    "c": 0.17867,
    "h": 311.5
  },
  "luminance": 0.05302
}

Semantic roles & 50–950 ramp

primary

#66178B

secondary

#68BF3F

accent

#EE3973

background

#F9F5FA

surface

#F2EAF4

border

#CCC6CE

text

#0E0510

muted

#7E797F

Preview Lab

Preview with #66178B

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

Preview Lab → · Contrast checker → · Palette generator →