#661B8B#661B8B

#661B8B is a dark, vivid purple. Relative luminance 0.055; OKLCH L 40.2% C 0.175 H 311.2°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#661B8B
RGB	rgb(102, 27, 139)
HSL	hsl(280, 67%, 33%)
HSV	hsv(280, 81%, 55%)
CMYK	cmyk(26.6%, 80.6%, 0%, 45.5%)
CIE-LAB	lab(28.04, 50.31, -46.41)
CIE-LCH	lch(28.04, 68.45, 317.31°)
OKLab	oklab(40.24% 0.1153 -0.1315)
OKLCH	oklch(40.24% 0.175 311.2)
XYZ	xyz(10.5307, 5.4730, 24.9227)
Luminance	0.0547 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Royal Purple (survey)

#4B006E

ΔE00 6.94

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661B8B #408B1B

analogous

#2E1B8B #661B8B #8B1B78

triadic

#661B8B #8B661B #1B8B66

tetradic

#661B8B #8B2E1B #408B1B #1B788B

square

#661B8B #8B2E1B #408B1B #1B788B

split-complementary

#661B8B #788B1B #1B8B2E

monochromatic

#1B0725 #401158 #661B8B #8C25BE #AA45DB

Accessibility & contrast

On white

10.03

#661B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#661B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661B8B

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661B8B	#FFFFFF	#000000	##FFFFFF
##661B8B	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8E

Deuteranopia (green-blind)

#004389

Tritanopia (blue-blind)

#613753

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #661b8b;
/* rgb */ color: rgb(102, 27, 139);
/* oklch */ color: oklch(40.2% 0.175 311.2);

Tailwind

colors: {
  custom: {
    50: '#9661ae',
    500: '#661b8b',
    950: '#000000',
  },
}

SCSS

$custom: #661b8b;
$custom-light: #9661ae;
$custom-dark: #000000;

JSON

{
  "hex": "#661b8b",
  "rgb": {
    "r": 102,
    "g": 27,
    "b": 139
  },
  "hsl": {
    "h": 280.179,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.4024,
    "c": 0.17491,
    "h": 311.2
  },
  "luminance": 0.05473
}

Semantic roles & 50–950 ramp

primary

#661B8B

secondary

#6DBC45

accent

#EA3D77

background

#F9F6FA

surface

#F2EBF4

border

#CCC6CE

text

#0E0510

muted

#7E7A7F

Preview Lab

Preview with #661B8B

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

Preview Lab → · Contrast checker → · Palette generator →