#551B8B#551B8B

#551B8B is a dark, vivid violet. Relative luminance 0.046; OKLCH L 37.9% C 0.171 H 302.0°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#551B8B
RGB	rgb(85, 27, 139)
HSL	hsl(271, 67%, 33%)
HSV	hsv(271, 81%, 55%)
CMYK	cmyk(38.8%, 80.6%, 0%, 45.5%)
CIE-LAB	lab(25.50, 47.29, -50.66)
CIE-LCH	lch(25.50, 69.30, 313.03°)
OKLab	oklab(37.93% 0.0905 -0.1446)
OKLCH	oklch(37.93% 0.171 302)
XYZ	xyz(8.7973, 4.5792, 24.8415)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Indigo

#4B0082

ΔE00 3.83

Royal Purple (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#551B8B #518B1B

analogous

#1D1B8B #551B8B #8B1B89

triadic

#551B8B #8B551B #1B8B55

tetradic

#551B8B #8B1D1B #518B1B #1B898B

square

#551B8B #8B1D1B #518B1B #1B898B

split-complementary

#551B8B #898B1B #1B8B1D

monochromatic

#160725 #361158 #551B8B #7425BE #9345DB

Accessibility & contrast

On white

10.96

#551B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#551B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #551B8B

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##551B8B	#FFFFFF	#000000	##FFFFFF
##551B8B	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#493953

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #551b8b;
/* rgb */ color: rgb(85, 27, 139);
/* oklch */ color: oklch(37.9% 0.171 302.0);

Tailwind

colors: {
  custom: {
    50: '#8b5fae',
    500: '#551b8b',
    950: '#000000',
  },
}

SCSS

$custom: #551b8b;
$custom-light: #8b5fae;
$custom-dark: #000000;

JSON

{
  "hex": "#551b8b",
  "rgb": {
    "r": 85,
    "g": 27,
    "b": 139
  },
  "hsl": {
    "h": 271.071,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37931,
    "c": 0.17062,
    "h": 302
  },
  "luminance": 0.04579
}

Semantic roles & 50–950 ramp

primary

#551B8B

secondary

#7FBC45

accent

#EA3D91

background

#F8F5FA

surface

#F0EAF4

border

#CBC6CE

text

#0C0510

muted

#7D797F

Preview Lab

Preview with #551B8B

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

Preview Lab → · Contrast checker → · Palette generator →