#304EB3#304EB3

#304EB3 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.3% C 0.164 H 267.1°. Best body text is #FFFFFF at 7.33:1 contrast (WCAG AA passes).

Color values

HEX	#304EB3
RGB	rgb(48, 78, 179)
HSL	hsl(226, 58%, 45%)
HSV	hsv(226, 73%, 70%)
CMYK	cmyk(73.2%, 56.4%, 0%, 29.8%)
CIE-LAB	lab(36.61, 24.59, -56.93)
CIE-LCH	lch(36.61, 62.01, 293.36°)
OKLab	oklab(46.27% -0.0083 -0.1641)
OKLCH	oklch(46.27% 0.164 267.1)
XYZ	xyz(12.0772, 9.3306, 43.8036)
Luminance	0.0933 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EB3 #B39530

analogous

#308FB3 #304EB3 #5430B3

triadic

#304EB3 #B3304E #4EB330

tetradic

#304EB3 #B3308F #B39530 #30B354

square

#304EB3 #B3308F #B39530 #30B354

split-complementary

#304EB3 #B35430 #8FB330

monochromatic

#162452 #233983 #304EB3 #506DD0 #8096DD

Accessibility & contrast

On white

7.33

#304EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#304EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EB3

7.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EB3	#FFFFFF	#000000	##FFFFFF
##304EB3	1.00	7.33	2.87	7.33
#FFFFFF	7.33	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB6

Deuteranopia (green-blind)

#0050B1

Tritanopia (blue-blind)

#006779

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #304eb3;
/* rgb */ color: rgb(48, 78, 179);
/* oklch */ color: oklch(46.3% 0.164 267.1);

Tailwind

colors: {
  custom: {
    50: '#7a7fca',
    500: '#304eb3',
    950: '#000000',
  },
}

SCSS

$custom: #304eb3;
$custom-light: #7a7fca;
$custom-dark: #000000;

JSON

{
  "hex": "#304eb3",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 179
  },
  "hsl": {
    "h": 226.26,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.46271,
    "c": 0.16431,
    "h": 267.1
  },
  "luminance": 0.09332
}

Semantic roles & 50–950 ramp

primary

#304EB3

secondary

#C6B479

accent

#BE47E1

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #304EB3

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

Preview Lab → · Contrast checker → · Palette generator →