#511B81#511B81

#511B81 is a dark, vivid violet. Relative luminance 0.041; OKLCH L 36.5% C 0.159 H 303.2°. Best body text is #FFFFFF at 11.52:1 contrast (WCAG AA passes).

Color values

HEX	#511B81
RGB	rgb(81, 27, 129)
HSL	hsl(272, 65%, 31%)
HSV	hsv(272, 79%, 51%)
CMYK	cmyk(37.2%, 79.1%, 0%, 49.4%)
CIE-LAB	lab(24.06, 44.12, -46.76)
CIE-LCH	lch(24.06, 64.29, 313.33°)
OKLab	oklab(36.53% 0.0872 -0.1334)
OKLCH	oklch(36.53% 0.159 303.2)
XYZ	xyz(7.7468, 4.1182, 21.1514)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Indigo

#4B0082

ΔE00 3.51

Royal Purple (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B81 #4B811B

analogous

#1E1B81 #511B81 #811B7E

triadic

#511B81 #81511B #1B8151

tetradic

#511B81 #811E1B #4B811B #1B7E81

square

#511B81 #811E1B #4B811B #1B7E81

split-complementary

#511B81 #7E811B #1B811E

monochromatic

#11061C #31104E #511B81 #7126B4 #903FD7

Accessibility & contrast

On white

11.52

#511B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#511B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B81

11.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B81	#FFFFFF	#000000	##FFFFFF
##511B81	1.00	11.52	1.82	11.52
#FFFFFF	11.52	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003884

Deuteranopia (green-blind)

#00397F

Tritanopia (blue-blind)

#47354D

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #511b81;
/* rgb */ color: rgb(81, 27, 129);
/* oklch */ color: oklch(36.5% 0.159 303.2);

Tailwind

colors: {
  custom: {
    50: '#875ea6',
    500: '#511b81',
    950: '#000000',
  },
}

SCSS

$custom: #511b81;
$custom-light: #875ea6;
$custom-dark: #000000;

JSON

{
  "hex": "#511b81",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 129
  },
  "hsl": {
    "h": 271.765,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3653,
    "c": 0.15932,
    "h": 303.2
  },
  "luminance": 0.04118
}

Semantic roles & 50–950 ramp

primary

#511B81

secondary

#79B543

accent

#E83F8F

background

#F8F5FA

surface

#F0E9F4

border

#CBC5CE

text

#0C050F

muted

#7D797F

Preview Lab

Preview with #511B81

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

Preview Lab → · Contrast checker → · Palette generator →