#331B72#331B72

#331B72 is a dark, vivid violet. Relative luminance 0.027; OKLCH L 31.5% C 0.139 H 288.3°. Best body text is #FFFFFF at 13.63:1 contrast (WCAG AA passes).

Color values

HEX	#331B72
RGB	rgb(51, 27, 114)
HSL	hsl(257, 62%, 28%)
HSV	hsv(257, 76%, 45%)
CMYK	cmyk(55.3%, 76.3%, 0%, 55.3%)
CIE-LAB	lab(18.81, 34.69, -45.93)
CIE-LCH	lch(18.81, 57.56, 307.06°)
OKLab	oklab(31.55% 0.0437 -0.132)
OKLCH	oklch(31.55% 0.139 288.3)
XYZ	xyz(4.7935, 2.7023, 16.1854)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B72 #5A721B

analogous

#1B2E72 #331B72 #5F1B72

triadic

#331B72 #72331B #1B7233

tetradic

#331B72 #721B2E #5A721B #1B725F

square

#331B72 #721B2E #5A721B #1B725F

split-complementary

#331B72 #725F1B #2E721B

monochromatic

#0B0619 #1D0F41 #331B72 #4927A3 #6238D0

Accessibility & contrast

On white

13.63

#331B72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#331B72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B72

13.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B72	#FFFFFF	#000000	##FFFFFF
##331B72	1.00	13.63	1.54	13.63
#FFFFFF	13.63	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003075

Deuteranopia (green-blind)

#002B70

Tritanopia (blue-blind)

#1A3245

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #331b72;
/* rgb */ color: rgb(51, 27, 114);
/* oklch */ color: oklch(31.5% 0.139 288.3);

Tailwind

colors: {
  custom: {
    50: '#725a9b',
    500: '#331b72',
    950: '#000000',
  },
}

SCSS

$custom: #331b72;
$custom-light: #725a9b;
$custom-dark: #000000;

JSON

{
  "hex": "#331b72",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 114
  },
  "hsl": {
    "h": 256.552,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.31547,
    "c": 0.13908,
    "h": 288.3
  },
  "luminance": 0.02703
}

Semantic roles & 50–950 ramp

primary

#331B72

secondary

#8BA742

accent

#E543B8

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#09040E

muted

#7B797E

Preview Lab

Preview with #331B72

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

Preview Lab → · Contrast checker → · Palette generator →