#551B81#551B81

#551B81 is a dark, vivid violet. Relative luminance 0.043; OKLCH L 37.1% C 0.160 H 305.6°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#551B81
RGB	rgb(85, 27, 129)
HSL	hsl(274, 65%, 31%)
HSV	hsv(274, 79%, 51%)
CMYK	cmyk(34.1%, 79.1%, 0%, 49.4%)
CIE-LAB	lab(24.64, 44.86, -45.79)
CIE-LCH	lch(24.64, 64.10, 314.41°)
OKLab	oklab(37.06% 0.0932 -0.1303)
OKLCH	oklch(37.06% 0.16 305.6)
XYZ	xyz(8.0998, 4.3002, 21.1679)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Indigo

#4B0082

ΔE00 3.87

Royal Purple (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#551B81 #47811B

analogous

#221B81 #551B81 #811B7A

triadic

#551B81 #81551B #1B8155

tetradic

#551B81 #81221B #47811B #1B7A81

square

#551B81 #81221B #47811B #1B7A81

split-complementary

#551B81 #7A811B #1B8122

monochromatic

#12061C #34104E #551B81 #7626B4 #963FD7

Accessibility & contrast

On white

11.29

#551B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#551B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #551B81

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##551B81	#FFFFFF	#000000	##FFFFFF
##551B81	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003984

Deuteranopia (green-blind)

#003B7F

Tritanopia (blue-blind)

#4D354D

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #551b81;
/* rgb */ color: rgb(85, 27, 129);
/* oklch */ color: oklch(37.1% 0.160 305.6);

Tailwind

colors: {
  custom: {
    50: '#8a5ea6',
    500: '#551b81',
    950: '#000000',
  },
}

SCSS

$custom: #551b81;
$custom-light: #8a5ea6;
$custom-dark: #000000;

JSON

{
  "hex": "#551b81",
  "rgb": {
    "r": 85,
    "g": 27,
    "b": 129
  },
  "hsl": {
    "h": 274.118,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37062,
    "c": 0.16022,
    "h": 305.6
  },
  "luminance": 0.043
}

Semantic roles & 50–950 ramp

primary

#551B81

secondary

#74B543

accent

#E83F88

background

#F8F5FA

surface

#F0E9F4

border

#CBC5CE

text

#0C050F

muted

#7D797F

Preview Lab

Preview with #551B81

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

Preview Lab → · Contrast checker → · Palette generator →