#331B99#331B99

#331B99 is a dark, vivid violet. Relative luminance 0.038; OKLCH L 35.7% C 0.187 H 279.9°. Best body text is #FFFFFF at 11.95:1 contrast (WCAG AA passes).

Color values

HEX	#331B99
RGB	rgb(51, 27, 153)
HSL	hsl(251, 70%, 35%)
HSV	hsv(251, 82%, 60%)
CMYK	cmyk(66.7%, 82.4%, 0%, 40%)
CIE-LAB	lab(22.95, 46.60, -63.65)
CIE-LCH	lch(22.95, 78.89, 306.21°)
OKLab	oklab(35.68% 0.0322 -0.1838)
OKLCH	oklch(35.68% 0.187 279.9)
XYZ	xyz(7.5051, 3.7870, 30.4663)
Luminance	0.0379 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B99 #81991B

analogous

#1B4299 #331B99 #721B99

triadic

#331B99 #99331B #1B9933

tetradic

#331B99 #991B42 #81991B #1B9972

square

#331B99 #991B42 #81991B #1B9972

split-complementary

#331B99 #99721B #42991B

monochromatic

#100931 #221265 #331B99 #4424CD #6A4FE0

Accessibility & contrast

On white

11.95

#331B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#331B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B99

11.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B99	#FFFFFF	#000000	##FFFFFF
##331B99	1.00	11.95	1.76	11.95
#FFFFFF	11.95	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B9C

Deuteranopia (green-blind)

#003297

Tritanopia (blue-blind)

#00425B

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #331b99;
/* rgb */ color: rgb(51, 27, 153);
/* oklch */ color: oklch(35.7% 0.187 279.9);

Tailwind

colors: {
  custom: {
    50: '#7a5cb8',
    500: '#331b99',
    950: '#000000',
  },
}

SCSS

$custom: #331b99;
$custom-light: #7a5cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#331b99",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 153
  },
  "hsl": {
    "h": 251.429,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.35681,
    "c": 0.18656,
    "h": 279.9
  },
  "luminance": 0.03788
}

Semantic roles & 50–950 ramp

primary

#331B99

secondary

#ACC24E

accent

#ED3BCB

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #331B99

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

Preview Lab → · Contrast checker → · Palette generator →