#303F99#303F99

#303F99 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.1% C 0.147 H 271.2°. Best body text is #FFFFFF at 9.14:1 contrast (WCAG AA passes).

Color values

HEX	#303F99
RGB	rgb(48, 63, 153)
HSL	hsl(231, 52%, 39%)
HSV	hsv(231, 69%, 60%)
CMYK	cmyk(68.6%, 58.8%, 0%, 40%)
CIE-LAB	lab(30.60, 24.86, -51.12)
CIE-LCH	lch(30.60, 56.84, 295.94°)
OKLab	oklab(41.14% 0.0032 -0.1472)
OKLCH	oklch(41.14% 0.147 271.2)
XYZ	xyz(8.7443, 6.4825, 30.9212)
Luminance	0.0648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303F99 #998A30

analogous

#307399 #303F99 #563099

triadic

#303F99 #99303F #3F9930

tetradic

#303F99 #993073 #998A30 #309956

square

#303F99 #993073 #998A30 #309956

split-complementary

#303F99 #995630 #739930

monochromatic

#13193C #212C6A #303F99 #4255C4 #717FD2

Accessibility & contrast

On white

9.14

#303F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#303F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303F99

9.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303F99	#FFFFFF	#000000	##FFFFFF
##303F99	1.00	9.14	2.30	9.14
#FFFFFF	9.14	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9C

Deuteranopia (green-blind)

#004397

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #303f99;
/* rgb */ color: rgb(48, 63, 153);
/* oklch */ color: oklch(41.1% 0.147 271.2);

Tailwind

colors: {
  custom: {
    50: '#7673b8',
    500: '#303f99',
    950: '#000000',
  },
}

SCSS

$custom: #303f99;
$custom-light: #7673b8;
$custom-dark: #000000;

JSON

{
  "hex": "#303f99",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 153
  },
  "hsl": {
    "h": 231.429,
    "s": 52.239,
    "l": 39.412
  },
  "oklch": {
    "l": 0.41135,
    "c": 0.14724,
    "h": 271.2
  },
  "luminance": 0.06483
}

Semantic roles & 50–950 ramp

primary

#303F99

secondary

#BAAF6B

accent

#C74CDC

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #303F99

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

Preview Lab → · Contrast checker → · Palette generator →