#304BB9#304BB9

#304BB9 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.2% C 0.176 H 268.1°. Best body text is #FFFFFF at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#304BB9
RGB	rgb(48, 75, 185)
HSL	hsl(228, 59%, 46%)
HSV	hsv(228, 74%, 73%)
CMYK	cmyk(74.1%, 59.5%, 0%, 27.5%)
CIE-LAB	lab(36.29, 28.79, -60.99)
CIE-LCH	lch(36.29, 67.44, 295.27°)
OKLab	oklab(46.18% -0.0058 -0.1761)
OKLCH	oklch(46.18% 0.176 268.1)
XYZ	xyz(12.4889, 9.1620, 46.9998)
Luminance	0.0916 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304BB9 #B99E30

analogous

#308FB9 #304BB9 #5930B9

triadic

#304BB9 #B9304B #4BB930

tetradic

#304BB9 #B9308F #B99E30 #30B959

square

#304BB9 #B9308F #B99E30 #30B959

split-complementary

#304BB9 #B95930 #8FB930

monochromatic

#172458 #233788 #304BB9 #546DD3 #8496DF

Accessibility & contrast

On white

7.41

#304BB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#304BB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304BB9

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304BB9	#FFFFFF	#000000	##FFFFFF
##304BB9	1.00	7.41	2.83	7.41
#FFFFFF	7.41	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBD

Deuteranopia (green-blind)

#004FB7

Tritanopia (blue-blind)

#00677A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304bb9;
/* rgb */ color: rgb(48, 75, 185);
/* oklch */ color: oklch(46.2% 0.176 268.1);

Tailwind

colors: {
  custom: {
    50: '#7c7dcf',
    500: '#304bb9',
    950: '#000000',
  },
}

SCSS

$custom: #304bb9;
$custom-light: #7c7dcf;
$custom-dark: #000000;

JSON

{
  "hex": "#304bb9",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 185
  },
  "hsl": {
    "h": 228.175,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.46179,
    "c": 0.17616,
    "h": 268.1
  },
  "luminance": 0.09163
}

Semantic roles & 50–950 ramp

primary

#304BB9

secondary

#C9B97C

accent

#C346E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304BB9

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

Preview Lab → · Contrast checker → · Palette generator →