#303A8D#303A8D

#303A8D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.137 H 273.1°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#303A8D
RGB	rgb(48, 58, 141)
HSL	hsl(234, 49%, 37%)
HSV	hsv(234, 66%, 55%)
CMYK	cmyk(66%, 58.9%, 0%, 44.7%)
CIE-LAB	lab(28.32, 23.79, -47.47)
CIE-LCH	lch(28.32, 53.09, 296.62°)
OKLab	oklab(39.14% 0.0075 -0.1365)
OKLCH	oklch(39.14% 0.137 273.1)
XYZ	xyz(7.5381, 5.5769, 25.8733)
Luminance	0.0558 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303A8D #8D8330

analogous

#30698D #303A8D #54308D

triadic

#303A8D #8D303A #3A8D30

tetradic

#303A8D #8D3069 #8D8330 #308D54

square

#303A8D #8D3069 #8D8330 #308D54

split-complementary

#303A8D #8D5430 #698D30

monochromatic

#111432 #20275F #303A8D #404DBB #6B75CD

Accessibility & contrast

On white

9.93

#303A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#303A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303A8D

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303A8D	#FFFFFF	#000000	##FFFFFF
##303A8D	1.00	9.93	2.12	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004790

Deuteranopia (green-blind)

#003F8B

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #303a8d;
/* rgb */ color: rgb(48, 58, 141);
/* oklch */ color: oklch(39.1% 0.137 273.1);

Tailwind

colors: {
  custom: {
    50: '#7370af',
    500: '#303a8d',
    950: '#000000',
  },
}

SCSS

$custom: #303a8d;
$custom-light: #7370af;
$custom-dark: #000000;

JSON

{
  "hex": "#303a8d",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 141
  },
  "hsl": {
    "h": 233.548,
    "s": 49.206,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39138,
    "c": 0.13673,
    "h": 273.1
  },
  "luminance": 0.05578
}

Semantic roles & 50–950 ramp

primary

#303A8D

secondary

#B4AB65

accent

#CA4FD9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303A8D

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

Preview Lab → · Contrast checker → · Palette generator →