#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
RGB	rgb(51, 27, 155)
HSL	hsl(251, 70%, 36%)
HSV	hsv(251, 83%, 61%)
CMYK	cmyk(67.1%, 82.6%, 0%, 39.2%)
CIE-LAB	lab(23.18, 47.20, -64.50)
CIE-LCH	lch(23.18, 79.93, 306.19°)
OKLab	oklab(35.91% 0.0316 -0.1862)
OKLCH	oklch(35.91% 0.189 279.6)
XYZ	xyz(7.6717, 3.8536, 31.3435)
Luminance	0.0385 (WCAG relative)
Temperature	cool
Family	violet

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
##331B9B	1.00	11.86	1.77	11.86
#FFFFFF	11.86	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.86	1.00	21.00	1.00

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 →