#331B6E#331B6E

#331B6E is a dark, vivid violet. Relative luminance 0.026; OKLCH L 31.2% C 0.134 H 289.5°. Best body text is #FFFFFF at 13.79:1 contrast (WCAG AA passes).

Color values

HEX	#331B6E
RGB	rgb(51, 27, 110)
HSL	hsl(257, 61%, 27%)
HSV	hsv(257, 75%, 43%)
CMYK	cmyk(53.6%, 75.5%, 0%, 56.9%)
CIE-LAB	lab(18.42, 33.45, -43.97)
CIE-LCH	lch(18.42, 55.25, 307.26°)
OKLab	oklab(31.15% 0.0447 -0.1263)
OKLCH	oklch(31.15% 0.134 289.5)
XYZ	xyz(4.5708, 2.6133, 15.0124)
Luminance	0.0261 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Royal Purple (survey)

#4B006E

ΔE00 6.39

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B6E #566E1B

analogous

#1B2D6E #331B6E #5D1B6E

triadic

#331B6E #6E331B #1B6E33

tetradic

#331B6E #6E1B2D #566E1B #1B6E5D

square

#331B6E #6E1B2D #566E1B #1B6E5D

split-complementary

#331B6E #6E5D1B #2D6E1B

monochromatic

#0B0619 #1C0F3D #331B6E #4A279F #6236CE

Accessibility & contrast

On white

13.79

#331B6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#331B6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B6E

13.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B6E	#FFFFFF	#000000	##FFFFFF
##331B6E	1.00	13.79	1.52	13.79
#FFFFFF	13.79	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F70

Deuteranopia (green-blind)

#002B6C

Tritanopia (blue-blind)

#1E3142

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #331b6e;
/* rgb */ color: rgb(51, 27, 110);
/* oklch */ color: oklch(31.2% 0.134 289.5);

Tailwind

colors: {
  custom: {
    50: '#725a98',
    500: '#331b6e',
    950: '#000000',
  },
}

SCSS

$custom: #331b6e;
$custom-light: #725a98;
$custom-dark: #000000;

JSON

{
  "hex": "#331b6e",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 110
  },
  "hsl": {
    "h": 257.349,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.31154,
    "c": 0.13396,
    "h": 289.5
  },
  "luminance": 0.02613
}

Semantic roles & 50–950 ramp

primary

#331B6E

secondary

#87A342

accent

#E444B6

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040E

muted

#7B797E

Preview Lab

Preview with #331B6E

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

Preview Lab → · Contrast checker → · Palette generator →