#304EB9#304EB9

#304EB9 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.8% C 0.172 H 267.3°. Best body text is #FFFFFF at 7.20:1 contrast (WCAG AA passes).

Color values

HEX	#304EB9
RGB	rgb(48, 78, 185)
HSL	hsl(227, 59%, 46%)
HSV	hsv(227, 74%, 73%)
CMYK	cmyk(74.1%, 57.8%, 0%, 27.5%)
CIE-LAB	lab(37.08, 26.83, -59.72)
CIE-LCH	lch(37.08, 65.46, 294.19°)
OKLab	oklab(46.76% -0.008 -0.1723)
OKLCH	oklch(46.76% 0.172 267.3)
XYZ	xyz(12.6972, 9.5786, 47.0692)
Luminance	0.0958 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EB9 #B99B30

analogous

#3092B9 #304EB9 #5630B9

triadic

#304EB9 #B9304E #4EB930

tetradic

#304EB9 #B93092 #B99B30 #30B956

square

#304EB9 #B93092 #B99B30 #30B956

split-complementary

#304EB9 #B95630 #92B930

monochromatic

#172558 #233A88 #304EB9 #546FD3 #8498DF

Accessibility & contrast

On white

7.20

#304EB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#304EB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EB9

7.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EB9	#FFFFFF	#000000	##FFFFFF
##304EB9	1.00	7.20	2.92	7.20
#FFFFFF	7.20	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBD

Deuteranopia (green-blind)

#0051B7

Tritanopia (blue-blind)

#00697C

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304eb9;
/* rgb */ color: rgb(48, 78, 185);
/* oklch */ color: oklch(46.8% 0.172 267.3);

Tailwind

colors: {
  custom: {
    50: '#7c7fcf',
    500: '#304eb9',
    950: '#000000',
  },
}

SCSS

$custom: #304eb9;
$custom-light: #7c7fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#304eb9",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 185
  },
  "hsl": {
    "h": 226.861,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.46762,
    "c": 0.17247,
    "h": 267.3
  },
  "luminance": 0.0958
}

Semantic roles & 50–950 ramp

primary

#304EB9

secondary

#C9B87C

accent

#C046E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #304EB9

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

Preview Lab → · Contrast checker → · Palette generator →