#304CB9#304CB9

#304CB9 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.4% C 0.175 H 267.9°. Best body text is #FFFFFF at 7.34:1 contrast (WCAG AA passes).

Color values

HEX	#304CB9
RGB	rgb(48, 76, 185)
HSL	hsl(228, 59%, 46%)
HSV	hsv(228, 74%, 73%)
CMYK	cmyk(74.1%, 58.9%, 0%, 27.5%)
CIE-LAB	lab(36.55, 28.14, -60.57)
CIE-LCH	lch(36.55, 66.78, 294.92°)
OKLab	oklab(46.37% -0.0065 -0.1748)
OKLCH	oklch(46.37% 0.175 267.9)
XYZ	xyz(12.5573, 9.2987, 47.0226)
Luminance	0.0930 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB9 #B99D30

analogous

#3090B9 #304CB9 #5830B9

triadic

#304CB9 #B9304C #4CB930

tetradic

#304CB9 #B93090 #B99D30 #30B958

square

#304CB9 #B93090 #B99D30 #30B958

split-complementary

#304CB9 #B95830 #90B930

monochromatic

#172458 #233888 #304CB9 #546ED3 #8497DF

Accessibility & contrast

On white

7.34

#304CB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#304CB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB9

7.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB9	#FFFFFF	#000000	##FFFFFF
##304CB9	1.00	7.34	2.86	7.34
#FFFFFF	7.34	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBD

Deuteranopia (green-blind)

#0050B7

Tritanopia (blue-blind)

#00677B

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #304cb9;
/* rgb */ color: rgb(48, 76, 185);
/* oklch */ color: oklch(46.4% 0.175 267.9);

Tailwind

colors: {
  custom: {
    50: '#7c7dcf',
    500: '#304cb9',
    950: '#000000',
  },
}

SCSS

$custom: #304cb9;
$custom-light: #7c7dcf;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb9",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 185
  },
  "hsl": {
    "h": 227.737,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.46372,
    "c": 0.17492,
    "h": 267.9
  },
  "luminance": 0.093
}

Semantic roles & 50–950 ramp

primary

#304CB9

secondary

#C9B97C

accent

#C246E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304CB9

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

Preview Lab → · Contrast checker → · Palette generator →