#303A8A#303A8A

#303A8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.9% C 0.132 H 273.2°. Best body text is #FFFFFF at 10.01:1 contrast (WCAG AA passes).

Color values

HEX	#303A8A
RGB	rgb(48, 58, 138)
HSL	hsl(233, 48%, 36%)
HSV	hsv(233, 65%, 54%)
CMYK	cmyk(65.2%, 58%, 0%, 45.9%)
CIE-LAB	lab(28.08, 22.69, -45.99)
CIE-LCH	lch(28.08, 51.28, 296.26°)
OKLab	oklab(38.89% 0.0074 -0.1322)
OKLCH	oklch(38.89% 0.132 273.2)
XYZ	xyz(7.3179, 5.4888, 24.7136)
Luminance	0.0549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303A8A #8A8030

analogous

#30678A #303A8A #53308A

triadic

#303A8A #8A303A #3A8A30

tetradic

#303A8A #8A3067 #8A8030 #308A53

square

#303A8A #8A3067 #8A8030 #308A53

split-complementary

#303A8A #8A5330 #678A30

monochromatic

#10142F #20275D #303A8A #404DB7 #6974CB

Accessibility & contrast

On white

10.01

#303A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#303A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303A8A

10.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303A8A	#FFFFFF	#000000	##FFFFFF
##303A8A	1.00	10.01	2.10	10.01
#FFFFFF	10.01	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003E88

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #303a8a;
/* rgb */ color: rgb(48, 58, 138);
/* oklch */ color: oklch(38.9% 0.132 273.2);

Tailwind

colors: {
  custom: {
    50: '#7370ad',
    500: '#303a8a',
    950: '#000000',
  },
}

SCSS

$custom: #303a8a;
$custom-light: #7370ad;
$custom-dark: #000000;

JSON

{
  "hex": "#303a8a",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 233.333,
    "s": 48.387,
    "l": 36.471
  },
  "oklch": {
    "l": 0.38889,
    "c": 0.13241,
    "h": 273.2
  },
  "luminance": 0.05489
}

Semantic roles & 50–950 ramp

primary

#303A8A

secondary

#B2A964

accent

#C950D8

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303A8A

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

Preview Lab → · Contrast checker → · Palette generator →