#304CB4#304CB4

#304CB4 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.0% C 0.168 H 267.7°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#304CB4
RGB	rgb(48, 76, 180)
HSL	hsl(227, 58%, 45%)
HSV	hsv(227, 73%, 71%)
CMYK	cmyk(73.3%, 57.8%, 0%, 29.4%)
CIE-LAB	lab(36.16, 26.28, -58.26)
CIE-LCH	lch(36.16, 63.91, 294.28°)
OKLab	oklab(45.96% -0.0067 -0.168)
OKLCH	oklch(45.96% 0.168 267.7)
XYZ	xyz(12.0387, 9.0913, 44.2915)
Luminance	0.0909 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB4 #B49830

analogous

#308EB4 #304CB4 #5630B4

triadic

#304CB4 #B4304C #4CB430

tetradic

#304CB4 #B4308E #B49830 #30B456

square

#304CB4 #B4308E #B49830 #30B456

split-complementary

#304CB4 #B45630 #8EB430

monochromatic

#162353 #233884 #304CB4 #516CD1 #8195DD

Accessibility & contrast

On white

7.45

#304CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#304CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB4

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB4	#FFFFFF	#000000	##FFFFFF
##304CB4	1.00	7.45	2.82	7.45
#FFFFFF	7.45	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB8

Deuteranopia (green-blind)

#004FB2

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304cb4;
/* rgb */ color: rgb(48, 76, 180);
/* oklch */ color: oklch(46.0% 0.168 267.7);

Tailwind

colors: {
  custom: {
    50: '#7b7dcb',
    500: '#304cb4',
    950: '#000000',
  },
}

SCSS

$custom: #304cb4;
$custom-light: #7b7dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb4",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 180
  },
  "hsl": {
    "h": 227.273,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.45955,
    "c": 0.16816,
    "h": 267.7
  },
  "luminance": 0.09093
}

Semantic roles & 50–950 ramp

primary

#304CB4

secondary

#C6B679

accent

#C047E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304CB4

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

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