#331B9B#331B9B

#331B9B is a dark, vivid violet. Relative luminance 0.039; OKLCH L 35.9% C 0.189 H 279.6°. Best body text is #FFFFFF at 11.86:1 contrast (WCAG AA passes).

Color values

HEX#331B9B
RGBrgb(51, 27, 155)
HSLhsl(251, 70%, 36%)
HSVhsv(251, 83%, 61%)
CMYKcmyk(67.1%, 82.6%, 0%, 39.2%)
CIE-LABlab(23.18, 47.20, -64.50)
CIE-LCHlch(23.18, 79.93, 306.19°)
OKLaboklab(35.91% 0.0316 -0.1862)
OKLCHoklch(35.91% 0.189 279.6)
XYZxyz(7.6717, 3.8536, 31.3435)
Luminance0.0385 (WCAG relative)
Temperaturecool
Familyviolet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#331B9B #839B1B
analogous
#1B439B #331B9B #731B9B
triadic
#331B9B #9B331B #1B9B33
tetradic
#331B9B #9B1B43 #839B1B #1B9B73
square
#331B9B #9B1B43 #839B1B #1B9B73
split-complementary
#331B9B #9B731B #439B1B
monochromatic
#110933 #221267 #331B9B #4424CF #6B50E0

Accessibility & contrast

On white

11.86
#331B9B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.77
#331B9B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B9B
11.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##331B9B#FFFFFF#000000##FFFFFF
##331B9B1.0011.861.7711.86
#FFFFFF11.861.0021.001.00
#0000001.7721.001.0021.00
##FFFFFF11.861.0021.001.00

Color blindness preview

Protanopia (red-blind)
#003C9E
Deuteranopia (green-blind)
#003299
Tritanopia (blue-blind)
#00435C
Achromatopsia (no color)
#373737

Design tokens & code

CSS
--color: #331b9b;
/* rgb */ color: rgb(51, 27, 155);
/* oklch */ color: oklch(35.9% 0.189 279.6);
Tailwind
colors: {
  custom: {
    50: '#7a5cba',
    500: '#331b9b',
    950: '#000000',
  },
}
SCSS
$custom: #331b9b;
$custom-light: #7a5cba;
$custom-dark: #000000;
JSON
{
  "hex": "#331b9b",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 155
  },
  "hsl": {
    "h": 251.25,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.35905,
    "c": 0.18889,
    "h": 279.6
  },
  "luminance": 0.03854
}

Semantic roles & 50–950 ramp

primary
#331B9B
secondary
#ADC34F
accent
#ED3BCC
background
#F8F5FB
surface
#EFE9F6
border
#CAC5D0
text
#0B0412
muted
#7C7981

Preview Lab

Preview with #331B9B

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

Preview Lab → · Contrast checker → · Palette generator →

#331B9B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva