#331FA1#331FA1

#331FA1 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 37.0% C 0.193 H 278.3°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#331FA1
RGB	rgb(51, 31, 161)
HSL	hsl(249, 68%, 38%)
HSV	hsv(249, 81%, 63%)
CMYK	cmyk(68.3%, 80.7%, 0%, 36.9%)
CIE-LAB	lab(24.50, 47.13, -65.98)
CIE-LCH	lch(24.50, 81.09, 305.54°)
OKLab	oklab(37.02% 0.0278 -0.1906)
OKLCH	oklch(37.02% 0.193 278.3)
XYZ	xyz(8.2862, 4.2563, 34.0962)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331FA1 #8DA11F

analogous

#1F4CA1 #331FA1 #741FA1

triadic

#331FA1 #A1331F #1FA133

tetradic

#331FA1 #A11F4C #8DA11F #1FA174

square

#331FA1 #A11F4C #8DA11F #1FA174

split-complementary

#331FA1 #A1741F #4CA11F

monochromatic

#120B3A #23156E #331FA1 #4329D4 #6F5BDF

Accessibility & contrast

On white

11.34

#331FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#331FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331FA1

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331FA1	#FFFFFF	#000000	##FFFFFF
##331FA1	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FA5

Deuteranopia (green-blind)

#00359F

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #331fa1;
/* rgb */ color: rgb(51, 31, 161);
/* oklch */ color: oklch(37.0% 0.193 278.3);

Tailwind

colors: {
  custom: {
    50: '#7b5fbe',
    500: '#331fa1',
    950: '#000000',
  },
}

SCSS

$custom: #331fa1;
$custom-light: #7b5fbe;
$custom-dark: #000000;

JSON

{
  "hex": "#331fa1",
  "rgb": {
    "r": 51,
    "g": 31,
    "b": 161
  },
  "hsl": {
    "h": 249.231,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.37018,
    "c": 0.19262,
    "h": 278.3
  },
  "luminance": 0.04257
}

Semantic roles & 50–950 ramp

primary

#331FA1

secondary

#B3C458

accent

#EB3DD0

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #331FA1

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

Preview Lab → · Contrast checker → · Palette generator →