#304FB8#304FB8

#304FB8 is a mid, vivid blue. Relative luminance 0.097; OKLCH L 46.9% C 0.170 H 267.0°. Best body text is #FFFFFF at 7.15:1 contrast (WCAG AA passes).

Color values

HEX	#304FB8
RGB	rgb(48, 79, 184)
HSL	hsl(226, 59%, 45%)
HSV	hsv(226, 74%, 72%)
CMYK	cmyk(73.9%, 57.1%, 0%, 27.8%)
CIE-LAB	lab(37.26, 25.80, -58.82)
CIE-LCH	lch(37.26, 64.23, 293.68°)
OKLab	oklab(46.88% -0.0088 -0.1696)
OKLCH	oklch(46.88% 0.17 267)
XYZ	xyz(12.6636, 9.6797, 46.5391)
Luminance	0.0968 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304FB8 #B89930

analogous

#3093B8 #304FB8 #5530B8

triadic

#304FB8 #B8304F #4FB830

tetradic

#304FB8 #B83093 #B89930 #30B855

square

#304FB8 #B83093 #B89930 #30B855

split-complementary

#304FB8 #B85530 #93B830

monochromatic

#172557 #233A87 #304FB8 #5370D2 #8498DF

Accessibility & contrast

On white

7.15

#304FB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#304FB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304FB8

7.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304FB8	#FFFFFF	#000000	##FFFFFF
##304FB8	1.00	7.15	2.94	7.15
#FFFFFF	7.15	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBC

Deuteranopia (green-blind)

#0052B6

Tritanopia (blue-blind)

#00697C

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #304fb8;
/* rgb */ color: rgb(48, 79, 184);
/* oklch */ color: oklch(46.9% 0.170 267.0);

Tailwind

colors: {
  custom: {
    50: '#7b7fce',
    500: '#304fb8',
    950: '#000000',
  },
}

SCSS

$custom: #304fb8;
$custom-light: #7b7fce;
$custom-dark: #000000;

JSON

{
  "hex": "#304fb8",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 184
  },
  "hsl": {
    "h": 226.324,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.46878,
    "c": 0.16988,
    "h": 267
  },
  "luminance": 0.09681
}

Semantic roles & 50–950 ramp

primary

#304FB8

secondary

#C8B77C

accent

#BE46E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #304FB8

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

Preview Lab → · Contrast checker → · Palette generator →