#661C8B#661C8B

#661C8B is a dark, vivid purple. Relative luminance 0.055; OKLCH L 40.3% C 0.174 H 311.1°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#661C8B
RGB	rgb(102, 28, 139)
HSL	hsl(280, 66%, 33%)
HSV	hsv(280, 80%, 55%)
CMYK	cmyk(26.6%, 79.9%, 0%, 45.5%)
CIE-LAB	lab(28.17, 49.95, -46.21)
CIE-LCH	lch(28.17, 68.04, 317.23°)
OKLab	oklab(40.33% 0.1144 -0.1309)
OKLCH	oklch(40.33% 0.174 311.1)
XYZ	xyz(10.5541, 5.5196, 24.9305)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Royal Purple (survey)

#4B006E

ΔE00 7.02

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661C8B #418B1C

analogous

#2E1C8B #661C8B #8B1C78

triadic

#661C8B #8B661C #1C8B66

tetradic

#661C8B #8B2E1C #418B1C #1C788B

square

#661C8B #8B2E1C #418B1C #1C788B

split-complementary

#661C8B #788B1C #1C8B2E

monochromatic

#1B0725 #411258 #661C8B #8B26BE #A947DA

Accessibility & contrast

On white

9.98

#661C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#661C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661C8B

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661C8B	#FFFFFF	#000000	##FFFFFF
##661C8B	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8E

Deuteranopia (green-blind)

#004489

Tritanopia (blue-blind)

#613753

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #661c8b;
/* rgb */ color: rgb(102, 28, 139);
/* oklch */ color: oklch(40.3% 0.174 311.1);

Tailwind

colors: {
  custom: {
    50: '#9662ae',
    500: '#661c8b',
    950: '#000000',
  },
}

SCSS

$custom: #661c8b;
$custom-light: #9662ae;
$custom-dark: #000000;

JSON

{
  "hex": "#661c8b",
  "rgb": {
    "r": 102,
    "g": 28,
    "b": 139
  },
  "hsl": {
    "h": 280,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.40327,
    "c": 0.1739,
    "h": 311.1
  },
  "luminance": 0.05519
}

Semantic roles & 50–950 ramp

primary

#661C8B

secondary

#6EBC47

accent

#E93E77

background

#F9F6FA

surface

#F2EBF4

border

#CCC6CE

text

#0E0510

muted

#7E7A7F

Preview Lab

Preview with #661C8B

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

Preview Lab → · Contrast checker → · Palette generator →