#551B8A#551B8A

#551B8A is a dark, vivid violet. Relative luminance 0.045; OKLCH L 37.8% C 0.170 H 302.4°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).

Color values

HEX	#551B8A
RGB	rgb(85, 27, 138)
HSL	hsl(271, 67%, 32%)
HSV	hsv(271, 80%, 54%)
CMYK	cmyk(38.4%, 80.4%, 0%, 45.9%)
CIE-LAB	lab(25.41, 47.05, -50.18)
CIE-LCH	lch(25.41, 68.78, 313.16°)
OKLab	oklab(37.84% 0.0908 -0.1432)
OKLCH	oklch(37.84% 0.17 302.4)
XYZ	xyz(8.7246, 4.5501, 24.4584)
Luminance	0.0455 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Indigo

#4B0082

ΔE00 3.79

Royal Purple (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#551B8A #508A1B

analogous

#1D1B8A #551B8A #8A1B88

triadic

#551B8A #8A551B #1B8A55

tetradic

#551B8A #8A1D1B #508A1B #1B888A

square

#551B8A #8A1D1B #508A1B #1B888A

split-complementary

#551B8A #888A1B #1B8A1D

monochromatic

#160724 #351157 #551B8A #7525BD #9345DB

Accessibility & contrast

On white

10.99

#551B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#551B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #551B8A

10.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##551B8A	#FFFFFF	#000000	##FFFFFF
##551B8A	1.00	10.99	1.91	10.99
#FFFFFF	10.99	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8D

Deuteranopia (green-blind)

#003C88

Tritanopia (blue-blind)

#4A3952

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #551b8a;
/* rgb */ color: rgb(85, 27, 138);
/* oklch */ color: oklch(37.8% 0.170 302.4);

Tailwind

colors: {
  custom: {
    50: '#8b5fad',
    500: '#551b8a',
    950: '#000000',
  },
}

SCSS

$custom: #551b8a;
$custom-light: #8b5fad;
$custom-dark: #000000;

JSON

{
  "hex": "#551b8a",
  "rgb": {
    "r": 85,
    "g": 27,
    "b": 138
  },
  "hsl": {
    "h": 271.351,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37843,
    "c": 0.16958,
    "h": 302.4
  },
  "luminance": 0.0455
}

Semantic roles & 50–950 ramp

primary

#551B8A

secondary

#7EBC45

accent

#EA3E90

background

#F8F5FA

surface

#F0EAF4

border

#CBC6CE

text

#0C0510

muted

#7D797F

Preview Lab

Preview with #551B8A

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

Preview Lab → · Contrast checker → · Palette generator →