#331B81#331B81

#331B81 is a dark, vivid violet. Relative luminance 0.031; OKLCH L 33.1% C 0.158 H 284.5°. Best body text is #FFFFFF at 13.01:1 contrast (WCAG AA passes).

Color values

HEX	#331B81
RGB	rgb(51, 27, 129)
HSL	hsl(254, 65%, 31%)
HSV	hsv(254, 79%, 51%)
CMYK	cmyk(60.5%, 79.1%, 0%, 49.4%)
CIE-LAB	lab(20.33, 39.32, -53.02)
CIE-LCH	lch(20.33, 66.01, 306.56°)
OKLab	oklab(33.08% 0.0396 -0.1528)
OKLCH	oklch(33.08% 0.158 284.5)
XYZ	xyz(5.7184, 3.0723, 21.0563)
Luminance	0.0307 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B81 #69811B

analogous

#1B3681 #331B81 #661B81

triadic

#331B81 #81331B #1B8133

tetradic

#331B81 #811B36 #69811B #1B8166

square

#331B81 #811B36 #69811B #1B8166

split-complementary

#331B81 #81661B #36811B

monochromatic

#0B061C #1F104E #331B81 #4726B4 #633FD7

Accessibility & contrast

On white

13.01

#331B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#331B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B81

13.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B81	#FFFFFF	#000000	##FFFFFF
##331B81	1.00	13.01	1.61	13.01
#FFFFFF	13.01	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003484

Deuteranopia (green-blind)

#002E7F

Tritanopia (blue-blind)

#05384D

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #331b81;
/* rgb */ color: rgb(51, 27, 129);
/* oklch */ color: oklch(33.1% 0.158 284.5);

Tailwind

colors: {
  custom: {
    50: '#755ba7',
    500: '#331b81',
    950: '#000000',
  },
}

SCSS

$custom: #331b81;
$custom-light: #755ba7;
$custom-dark: #000000;

JSON

{
  "hex": "#331b81",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 129
  },
  "hsl": {
    "h": 254.118,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.33078,
    "c": 0.15782,
    "h": 284.5
  },
  "luminance": 0.03073
}

Semantic roles & 50–950 ramp

primary

#331B81

secondary

#9AB543

accent

#E83FC1

background

#F7F5FA

surface

#EEE9F4

border

#C9C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #331B81

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

Preview Lab → · Contrast checker → · Palette generator →