#304CB5#304CB5

#304CB5 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.0% C 0.170 H 267.8°. Best body text is #FFFFFF at 7.43:1 contrast (WCAG AA passes).

Color values

HEX	#304CB5
RGB	rgb(48, 76, 181)
HSL	hsl(227, 58%, 45%)
HSV	hsv(227, 73%, 71%)
CMYK	cmyk(73.5%, 58%, 0%, 29%)
CIE-LAB	lab(36.24, 26.65, -58.72)
CIE-LCH	lch(36.24, 64.49, 294.41°)
OKLab	oklab(46.04% -0.0066 -0.1694)
OKLCH	oklch(46.04% 0.17 267.8)
XYZ	xyz(12.1410, 9.1322, 44.8299)
Luminance	0.0913 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB5 #B59930

analogous

#308FB5 #304CB5 #5630B5

triadic

#304CB5 #B5304C #4CB530

tetradic

#304CB5 #B5308F #B59930 #30B556

square

#304CB5 #B5308F #B59930 #30B556

split-complementary

#304CB5 #B55630 #8FB530

monochromatic

#162354 #233885 #304CB5 #516CD1 #8295DE

Accessibility & contrast

On white

7.43

#304CB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#304CB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB5

7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB5	#FFFFFF	#000000	##FFFFFF
##304CB5	1.00	7.43	2.83	7.43
#FFFFFF	7.43	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB9

Deuteranopia (green-blind)

#004FB3

Tritanopia (blue-blind)

#006679

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304cb5;
/* rgb */ color: rgb(48, 76, 181);
/* oklch */ color: oklch(46.0% 0.170 267.8);

Tailwind

colors: {
  custom: {
    50: '#7b7dcc',
    500: '#304cb5',
    950: '#000000',
  },
}

SCSS

$custom: #304cb5;
$custom-light: #7b7dcc;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb5",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 181
  },
  "hsl": {
    "h": 227.368,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.46038,
    "c": 0.16952,
    "h": 267.8
  },
  "luminance": 0.09133
}

Semantic roles & 50–950 ramp

primary

#304CB5

secondary

#C7B77A

accent

#C146E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304CB5

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

Preview Lab → · Contrast checker → · Palette generator →