#331B6F#331B6F

#331B6F is a dark, vivid violet. Relative luminance 0.026; OKLCH L 31.3% C 0.135 H 289.2°. Best body text is #FFFFFF at 13.75:1 contrast (WCAG AA passes).

Color values

HEX	#331B6F
RGB	rgb(51, 27, 111)
HSL	hsl(257, 61%, 27%)
HSV	hsv(257, 76%, 44%)
CMYK	cmyk(54.1%, 75.7%, 0%, 56.5%)
CIE-LAB	lab(18.52, 33.76, -44.46)
CIE-LCH	lch(18.52, 55.83, 307.21°)
OKLab	oklab(31.25% 0.0445 -0.1277)
OKLCH	oklch(31.25% 0.135 289.2)
XYZ	xyz(4.6256, 2.6352, 15.3008)
Luminance	0.0263 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Royal Purple (survey)

#4B006E

ΔE00 6.40

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B6F #576F1B

analogous

#1B2D6F #331B6F #5D1B6F

triadic

#331B6F #6F331B #1B6F33

tetradic

#331B6F #6F1B2D #576F1B #1B6F5D

square

#331B6F #6F1B2D #576F1B #1B6F5D

split-complementary

#331B6F #6F5D1B #2D6F1B

monochromatic

#0B0619 #1C0F3E #331B6F #4A27A0 #6236CE

Accessibility & contrast

On white

13.75

#331B6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#331B6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B6F

13.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B6F	#FFFFFF	#000000	##FFFFFF
##331B6F	1.00	13.75	1.53	13.75
#FFFFFF	13.75	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F71

Deuteranopia (green-blind)

#002B6D

Tritanopia (blue-blind)

#1D3143

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #331b6f;
/* rgb */ color: rgb(51, 27, 111);
/* oklch */ color: oklch(31.3% 0.135 289.2);

Tailwind

colors: {
  custom: {
    50: '#725a99',
    500: '#331b6f',
    950: '#000000',
  },
}

SCSS

$custom: #331b6f;
$custom-light: #725a99;
$custom-dark: #000000;

JSON

{
  "hex": "#331b6f",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 111
  },
  "hsl": {
    "h": 257.143,
    "s": 60.87,
    "l": 27.059
  },
  "oklch": {
    "l": 0.31252,
    "c": 0.13524,
    "h": 289.2
  },
  "luminance": 0.02635
}

Semantic roles & 50–950 ramp

primary

#331B6F

secondary

#88A442

accent

#E444B6

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040E

muted

#7B797E

Preview Lab

Preview with #331B6F

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

Preview Lab → · Contrast checker → · Palette generator →