#331F9A#331F9A

#331F9A is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.2% C 0.184 H 279.3°. Best body text is #FFFFFF at 11.64:1 contrast (WCAG AA passes).

Color values

HEX	#331F9A
RGB	rgb(51, 31, 154)
HSL	hsl(250, 66%, 36%)
HSV	hsv(250, 80%, 60%)
CMYK	cmyk(66.9%, 79.9%, 0%, 39.6%)
CIE-LAB	lab(23.72, 44.99, -62.99)
CIE-LCH	lch(23.72, 77.41, 305.54°)
OKLab	oklab(36.25% 0.0299 -0.1819)
OKLCH	oklch(36.25% 0.184 279.3)
XYZ	xyz(7.6861, 4.0162, 30.9358)
Luminance	0.0402 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331F9A #869A1F

analogous

#1F499A #331F9A #711F9A

triadic

#331F9A #9A331F #1F9A33

tetradic

#331F9A #9A1F49 #869A1F #1F9A71

square

#331F9A #9A1F49 #869A1F #1F9A71

split-complementary

#331F9A #9A711F #499A1F

monochromatic

#110A34 #221567 #331F9A #4429CD #6C56DD

Accessibility & contrast

On white

11.64

#331F9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#331F9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331F9A

11.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331F9A	#FFFFFF	#000000	##FFFFFF
##331F9A	1.00	11.64	1.80	11.64
#FFFFFF	11.64	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9D

Deuteranopia (green-blind)

#003498

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #331f9a;
/* rgb */ color: rgb(51, 31, 154);
/* oklch */ color: oklch(36.2% 0.184 279.3);

Tailwind

colors: {
  custom: {
    50: '#7a5eb9',
    500: '#331f9a',
    950: '#000000',
  },
}

SCSS

$custom: #331f9a;
$custom-light: #7a5eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#331f9a",
  "rgb": {
    "r": 51,
    "g": 31,
    "b": 154
  },
  "hsl": {
    "h": 249.756,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.36249,
    "c": 0.18432,
    "h": 279.3
  },
  "luminance": 0.04017
}

Semantic roles & 50–950 ramp

primary

#331F9A

secondary

#AFC154

accent

#E93ECE

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #331F9A

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

Preview Lab → · Contrast checker → · Palette generator →