#304DB8#304DB8

#304DB8 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.5% C 0.172 H 267.6°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#304DB8
RGB	rgb(48, 77, 184)
HSL	hsl(227, 59%, 45%)
HSV	hsv(227, 74%, 72%)
CMYK	cmyk(73.9%, 58.2%, 0%, 27.8%)
CIE-LAB	lab(36.73, 27.11, -59.68)
CIE-LCH	lch(36.73, 65.55, 294.43°)
OKLab	oklab(46.48% -0.0073 -0.1722)
OKLCH	oklch(46.48% 0.172 267.6)
XYZ	xyz(12.5215, 9.3955, 46.4917)
Luminance	0.0940 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304DB8 #B89B30

analogous

#3091B8 #304DB8 #5730B8

triadic

#304DB8 #B8304D #4DB830

tetradic

#304DB8 #B83091 #B89B30 #30B857

square

#304DB8 #B83091 #B89B30 #30B857

split-complementary

#304DB8 #B85730 #91B830

monochromatic

#172457 #233987 #304DB8 #536ED2 #8497DF

Accessibility & contrast

On white

7.29

#304DB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#304DB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304DB8

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304DB8	#FFFFFF	#000000	##FFFFFF
##304DB8	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBC

Deuteranopia (green-blind)

#0050B6

Tritanopia (blue-blind)

#00687B

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #304db8;
/* rgb */ color: rgb(48, 77, 184);
/* oklch */ color: oklch(46.5% 0.172 267.6);

Tailwind

colors: {
  custom: {
    50: '#7c7ece',
    500: '#304db8',
    950: '#000000',
  },
}

SCSS

$custom: #304db8;
$custom-light: #7c7ece;
$custom-dark: #000000;

JSON

{
  "hex": "#304db8",
  "rgb": {
    "r": 48,
    "g": 77,
    "b": 184
  },
  "hsl": {
    "h": 227.206,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.46483,
    "c": 0.17234,
    "h": 267.6
  },
  "luminance": 0.09397
}

Semantic roles & 50–950 ramp

primary

#304DB8

secondary

#C8B87C

accent

#C146E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304DB8

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

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