#331B7A#331B7A

#331B7A is a dark, vivid violet. Relative luminance 0.029; OKLCH L 32.4% C 0.149 H 286.2°. Best body text is #FFFFFF at 13.30:1 contrast (WCAG AA passes).

Color values

HEX	#331B7A
RGB	rgb(51, 27, 122)
HSL	hsl(255, 64%, 29%)
HSV	hsv(255, 78%, 48%)
CMYK	cmyk(58.2%, 77.9%, 0%, 52.2%)
CIE-LAB	lab(19.61, 37.17, -49.76)
CIE-LCH	lch(19.61, 62.10, 306.76°)
OKLab	oklab(32.35% 0.0416 -0.1432)
OKLCH	oklch(32.35% 0.149 286.2)
XYZ	xyz(5.2690, 2.8925, 18.6893)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B7A #627A1B

analogous

#1B337A #331B7A #631B7A

triadic

#331B7A #7A331B #1B7A33

tetradic

#331B7A #7A1B33 #627A1B #1B7A63

square

#331B7A #7A1B33 #627A1B #1B7A63

split-complementary

#331B7A #7A631B #337A1B

monochromatic

#0A0619 #1E1048 #331B7A #4826AC #623CD4

Accessibility & contrast

On white

13.30

#331B7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#331B7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B7A

13.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B7A	#FFFFFF	#000000	##FFFFFF
##331B7A	1.00	13.30	1.58	13.30
#FFFFFF	13.30	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327D

Deuteranopia (green-blind)

#002D78

Tritanopia (blue-blind)

#123649

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #331b7a;
/* rgb */ color: rgb(51, 27, 122);
/* oklch */ color: oklch(32.4% 0.149 286.2);

Tailwind

colors: {
  custom: {
    50: '#745aa1',
    500: '#331b7a',
    950: '#000000',
  },
}

SCSS

$custom: #331b7a;
$custom-light: #745aa1;
$custom-dark: #000000;

JSON

{
  "hex": "#331b7a",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 122
  },
  "hsl": {
    "h": 255.158,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.32353,
    "c": 0.14916,
    "h": 286.2
  },
  "luminance": 0.02893
}

Semantic roles & 50–950 ramp

primary

#331B7A

secondary

#93AE43

accent

#E741BD

background

#F7F5FA

surface

#EDE9F3

border

#C8C5CD

text

#09040F

muted

#7B797F

Preview Lab

Preview with #331B7A

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

Preview Lab → · Contrast checker → · Palette generator →