#304FB5#304FB5

#304FB5 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.6% C 0.166 H 266.9°. Best body text is #FFFFFF at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#304FB5
RGB	rgb(48, 79, 181)
HSL	hsl(226, 58%, 45%)
HSV	hsv(226, 73%, 71%)
CMYK	cmyk(73.5%, 56.4%, 0%, 29%)
CIE-LAB	lab(37.03, 24.68, -57.43)
CIE-LCH	lch(37.03, 62.51, 293.25°)
OKLab	oklab(46.63% -0.0089 -0.1655)
OKLCH	oklch(46.63% 0.166 266.9)
XYZ	xyz(12.3525, 9.5552, 44.9004)
Luminance	0.0956 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304FB5 #B59630

analogous

#3092B5 #304FB5 #5330B5

triadic

#304FB5 #B5304F #4FB530

tetradic

#304FB5 #B53092 #B59630 #30B553

square

#304FB5 #B53092 #B59630 #30B553

split-complementary

#304FB5 #B55330 #92B530

monochromatic

#162554 #233A85 #304FB5 #516FD1 #8297DE

Accessibility & contrast

On white

7.21

#304FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#304FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304FB5

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304FB5	#FFFFFF	#000000	##FFFFFF
##304FB5	1.00	7.21	2.91	7.21
#FFFFFF	7.21	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EB8

Deuteranopia (green-blind)

#0051B3

Tritanopia (blue-blind)

#00687A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304fb5;
/* rgb */ color: rgb(48, 79, 181);
/* oklch */ color: oklch(46.6% 0.166 266.9);

Tailwind

colors: {
  custom: {
    50: '#7b7fcc',
    500: '#304fb5',
    950: '#000000',
  },
}

SCSS

$custom: #304fb5;
$custom-light: #7b7fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#304fb5",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 181
  },
  "hsl": {
    "h": 226.015,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.46633,
    "c": 0.16579,
    "h": 266.9
  },
  "luminance": 0.09557
}

Semantic roles & 50–950 ramp

primary

#304FB5

secondary

#C7B57A

accent

#BD46E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #304FB5

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

Preview Lab → · Contrast checker → · Palette generator →