#331B66#331B66

#331B66 is a dark, vivid violet. Relative luminance 0.024; OKLCH L 30.4% C 0.124 H 292.1°. Best body text is #FFFFFF at 14.10:1 contrast (WCAG AA passes).

Color values

HEX	#331B66
RGB	rgb(51, 27, 102)
HSL	hsl(259, 58%, 25%)
HSV	hsv(259, 74%, 40%)
CMYK	cmyk(50%, 73.5%, 0%, 60%)
CIE-LAB	lab(17.68, 30.98, -39.97)
CIE-LCH	lch(17.68, 50.57, 307.78°)
OKLab	oklab(30.39% 0.0464 -0.1145)
OKLCH	oklch(30.39% 0.124 292.1)
XYZ	xyz(4.1548, 2.4468, 12.8212)
Luminance	0.0245 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Royal Purple (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B66 #4E661B

analogous

#1B2866 #331B66 #581B66

triadic

#331B66 #66331B #1B6633

tetradic

#331B66 #661B28 #4E661B #1B6658

square

#331B66 #661B28 #4E661B #1B6658

split-complementary

#331B66 #66581B #28661B

monochromatic

#0C0618 #1B0E36 #331B66 #4B2896 #6335C7

Accessibility & contrast

On white

14.10

#331B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#331B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B66

14.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B66	#FFFFFF	#000000	##FFFFFF
##331B66	1.00	14.10	1.49	14.10
#FFFFFF	14.10	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C68

Deuteranopia (green-blind)

#002A65

Tritanopia (blue-blind)

#232E3E

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #331b66;
/* rgb */ color: rgb(51, 27, 102);
/* oklch */ color: oklch(30.4% 0.124 292.1);

Tailwind

colors: {
  custom: {
    50: '#705992',
    500: '#331b66',
    950: '#000000',
  },
}

SCSS

$custom: #331b66;
$custom-light: #705992;
$custom-dark: #000000;

JSON

{
  "hex": "#331b66",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 102
  },
  "hsl": {
    "h": 259.2,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.30392,
    "c": 0.12358,
    "h": 292.1
  },
  "luminance": 0.02447
}

Semantic roles & 50–950 ramp

primary

#331B66

secondary

#7F9B41

accent

#E146B0

background

#F7F5F9

surface

#EDE9F1

border

#C8C5CB

text

#08040D

muted

#7B797E

Preview Lab

Preview with #331B66

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

Preview Lab → · Contrast checker → · Palette generator →