#304EB8#304EB8

#304EB8 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.7% C 0.171 H 267.3°. Best body text is #FFFFFF at 7.22:1 contrast (WCAG AA passes).

Color values

HEX	#304EB8
RGB	rgb(48, 78, 184)
HSL	hsl(227, 59%, 45%)
HSV	hsv(227, 74%, 72%)
CMYK	cmyk(73.9%, 57.6%, 0%, 27.8%)
CIE-LAB	lab(37.00, 26.45, -59.25)
CIE-LCH	lch(37.00, 64.89, 294.06°)
OKLab	oklab(46.68% -0.008 -0.1709)
OKLCH	oklch(46.68% 0.171 267.3)
XYZ	xyz(12.5920, 9.5365, 46.5152)
Luminance	0.0954 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EB8 #B89A30

analogous

#3092B8 #304EB8 #5630B8

triadic

#304EB8 #B8304E #4EB830

tetradic

#304EB8 #B83092 #B89A30 #30B856

square

#304EB8 #B83092 #B89A30 #30B856

split-complementary

#304EB8 #B85630 #92B830

monochromatic

#172557 #233987 #304EB8 #536FD2 #8498DF

Accessibility & contrast

On white

7.22

#304EB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#304EB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EB8

7.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EB8	#FFFFFF	#000000	##FFFFFF
##304EB8	1.00	7.22	2.91	7.22
#FFFFFF	7.22	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBC

Deuteranopia (green-blind)

#0051B6

Tritanopia (blue-blind)

#00687B

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304eb8;
/* rgb */ color: rgb(48, 78, 184);
/* oklch */ color: oklch(46.7% 0.171 267.3);

Tailwind

colors: {
  custom: {
    50: '#7b7fce',
    500: '#304eb8',
    950: '#000000',
  },
}

SCSS

$custom: #304eb8;
$custom-light: #7b7fce;
$custom-dark: #000000;

JSON

{
  "hex": "#304eb8",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 184
  },
  "hsl": {
    "h": 226.765,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.4668,
    "c": 0.17111,
    "h": 267.3
  },
  "luminance": 0.09538
}

Semantic roles & 50–950 ramp

primary

#304EB8

secondary

#C8B77C

accent

#BF46E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #304EB8

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

Preview Lab → · Contrast checker → · Palette generator →