#331F9C#331F9C

#331F9C is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.5% C 0.187 H 279.0°. Best body text is #FFFFFF at 11.56:1 contrast (WCAG AA passes).

Color values

HEX	#331F9C
RGB	rgb(51, 31, 156)
HSL	hsl(250, 67%, 37%)
HSV	hsv(250, 80%, 61%)
CMYK	cmyk(67.3%, 80.1%, 0%, 38.8%)
CIE-LAB	lab(23.95, 45.60, -63.85)
CIE-LCH	lch(23.95, 78.47, 305.54°)
OKLab	oklab(36.47% 0.0293 -0.1844)
OKLCH	oklch(36.47% 0.187 279)
XYZ	xyz(7.8541, 4.0834, 31.8203)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331F9C #889C1F

analogous

#1F4A9C #331F9C #721F9C

triadic

#331F9C #9C331F #1F9C33

tetradic

#331F9C #9C1F4A #889C1F #1F9C72

square

#331F9C #9C1F4A #889C1F #1F9C72

split-complementary

#331F9C #9C721F #4A9C1F

monochromatic

#120B36 #221569 #331F9C #4429CF #6D58DE

Accessibility & contrast

On white

11.56

#331F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#331F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331F9C

11.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331F9C	#FFFFFF	#000000	##FFFFFF
##331F9C	1.00	11.56	1.82	11.56
#FFFFFF	11.56	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E9F

Deuteranopia (green-blind)

#00349A

Tritanopia (blue-blind)

#00455D

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #331f9c;
/* rgb */ color: rgb(51, 31, 156);
/* oklch */ color: oklch(36.5% 0.187 279.0);

Tailwind

colors: {
  custom: {
    50: '#7a5fba',
    500: '#331f9c',
    950: '#000000',
  },
}

SCSS

$custom: #331f9c;
$custom-light: #7a5fba;
$custom-dark: #000000;

JSON

{
  "hex": "#331f9c",
  "rgb": {
    "r": 51,
    "g": 31,
    "b": 156
  },
  "hsl": {
    "h": 249.6,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.36468,
    "c": 0.18671,
    "h": 279
  },
  "luminance": 0.04084
}

Semantic roles & 50–950 ramp

primary

#331F9C

secondary

#B0C155

accent

#EA3ECE

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #331F9C

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

Preview Lab → · Contrast checker → · Palette generator →