#331B78#331B78

#331B78 is a dark, vivid violet. Relative luminance 0.028; OKLCH L 32.1% C 0.147 H 286.7°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#331B78
RGB	rgb(51, 27, 120)
HSL	hsl(255, 63%, 29%)
HSV	hsv(255, 78%, 47%)
CMYK	cmyk(57.5%, 77.5%, 0%, 52.9%)
CIE-LAB	lab(19.41, 36.55, -48.81)
CIE-LCH	lch(19.41, 60.97, 306.82°)
OKLab	oklab(32.15% 0.0422 -0.1405)
OKLCH	oklch(32.15% 0.147 286.7)
XYZ	xyz(5.1463, 2.8435, 18.0433)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B78 #60781B

analogous

#1B3278 #331B78 #621B78

triadic

#331B78 #78331B #1B7833

tetradic

#331B78 #781B32 #60781B #1B7862

square

#331B78 #781B32 #60781B #1B7862

split-complementary

#331B78 #78621B #32781B

monochromatic

#0B0619 #1E1046 #331B78 #4826AA #623BD3

Accessibility & contrast

On white

13.39

#331B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#331B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B78

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B78	#FFFFFF	#000000	##FFFFFF
##331B78	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317B

Deuteranopia (green-blind)

#002C76

Tritanopia (blue-blind)

#143548

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #331b78;
/* rgb */ color: rgb(51, 27, 120);
/* oklch */ color: oklch(32.1% 0.147 286.7);

Tailwind

colors: {
  custom: {
    50: '#735aa0',
    500: '#331b78',
    950: '#000000',
  },
}

SCSS

$custom: #331b78;
$custom-light: #735aa0;
$custom-dark: #000000;

JSON

{
  "hex": "#331b78",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 120
  },
  "hsl": {
    "h": 255.484,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.32149,
    "c": 0.14666,
    "h": 286.7
  },
  "luminance": 0.02844
}

Semantic roles & 50–950 ramp

primary

#331B78

secondary

#91AC43

accent

#E641BC

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#09040F

muted

#7B797E

Preview Lab

Preview with #331B78

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

Preview Lab → · Contrast checker → · Palette generator →