#331F99#331F99

#331F99 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.1% C 0.183 H 279.5°. Best body text is #FFFFFF at 11.69:1 contrast (WCAG AA passes).

Color values

HEX	#331F99
RGB	rgb(51, 31, 153)
HSL	hsl(250, 66%, 36%)
HSV	hsv(250, 80%, 60%)
CMYK	cmyk(66.7%, 79.7%, 0%, 40%)
CIE-LAB	lab(23.62, 44.68, -62.56)
CIE-LCH	lch(23.62, 76.88, 305.54°)
OKLab	oklab(36.14% 0.0301 -0.1806)
OKLCH	oklch(36.14% 0.183 279.5)
XYZ	xyz(7.6032, 3.9831, 30.4990)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331F99 #85991F

analogous

#1F4899 #331F99 #701F99

triadic

#331F99 #99331F #1F9933

tetradic

#331F99 #991F48 #85991F #1F9970

square

#331F99 #991F48 #85991F #1F9970

split-complementary

#331F99 #99701F #48991F

monochromatic

#110A33 #221566 #331F99 #4429CC #6C56DD

Accessibility & contrast

On white

11.69

#331F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#331F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331F99

11.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331F99	#FFFFFF	#000000	##FFFFFF
##331F99	1.00	11.69	1.80	11.69
#FFFFFF	11.69	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9C

Deuteranopia (green-blind)

#003397

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #331f99;
/* rgb */ color: rgb(51, 31, 153);
/* oklch */ color: oklch(36.1% 0.183 279.5);

Tailwind

colors: {
  custom: {
    50: '#7a5eb8',
    500: '#331f99',
    950: '#000000',
  },
}

SCSS

$custom: #331f99;
$custom-light: #7a5eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#331f99",
  "rgb": {
    "r": 51,
    "g": 31,
    "b": 153
  },
  "hsl": {
    "h": 249.836,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.3614,
    "c": 0.18313,
    "h": 279.5
  },
  "luminance": 0.03984
}

Semantic roles & 50–950 ramp

primary

#331F99

secondary

#AEC054

accent

#E93FCD

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #331F99

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

Preview Lab → · Contrast checker → · Palette generator →