#304CB8#304CB8

#304CB8 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.3% C 0.174 H 267.8°. Best body text is #FFFFFF at 7.36:1 contrast (WCAG AA passes).

Color values

HEX	#304CB8
RGB	rgb(48, 76, 184)
HSL	hsl(228, 59%, 45%)
HSV	hsv(228, 74%, 72%)
CMYK	cmyk(73.9%, 58.7%, 0%, 27.8%)
CIE-LAB	lab(36.47, 27.76, -60.11)
CIE-LCH	lch(36.47, 66.21, 294.79°)
OKLab	oklab(46.29% -0.0066 -0.1735)
OKLCH	oklch(46.29% 0.174 267.8)
XYZ	xyz(12.4521, 9.2566, 46.4686)
Luminance	0.0926 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB8 #B89C30

analogous

#3090B8 #304CB8 #5830B8

triadic

#304CB8 #B8304C #4CB830

tetradic

#304CB8 #B83090 #B89C30 #30B858

square

#304CB8 #B83090 #B89C30 #30B858

split-complementary

#304CB8 #B85830 #90B830

monochromatic

#172457 #233887 #304CB8 #536DD2 #8496DF

Accessibility & contrast

On white

7.36

#304CB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#304CB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB8

7.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB8	#FFFFFF	#000000	##FFFFFF
##304CB8	1.00	7.36	2.85	7.36
#FFFFFF	7.36	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBC

Deuteranopia (green-blind)

#0050B6

Tritanopia (blue-blind)

#00677A

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #304cb8;
/* rgb */ color: rgb(48, 76, 184);
/* oklch */ color: oklch(46.3% 0.174 267.8);

Tailwind

colors: {
  custom: {
    50: '#7c7dce',
    500: '#304cb8',
    950: '#000000',
  },
}

SCSS

$custom: #304cb8;
$custom-light: #7c7dce;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb8",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 184
  },
  "hsl": {
    "h": 227.647,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.46288,
    "c": 0.17358,
    "h": 267.8
  },
  "luminance": 0.09258
}

Semantic roles & 50–950 ramp

primary

#304CB8

secondary

#C8B87C

accent

#C246E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304CB8

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

Preview Lab → · Contrast checker → · Palette generator →