#304CB7#304CB7

#304CB7 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.2% C 0.172 H 267.8°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#304CB7
RGB	rgb(48, 76, 183)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 74%, 72%)
CMYK	cmyk(73.8%, 58.5%, 0%, 28.2%)
CIE-LAB	lab(36.39, 27.39, -59.65)
CIE-LCH	lch(36.39, 65.64, 294.67°)
OKLab	oklab(46.2% -0.0066 -0.1721)
OKLCH	oklch(46.2% 0.172 267.8)
XYZ	xyz(12.3476, 9.2148, 45.9185)
Luminance	0.0922 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB7 #B79B30

analogous

#308FB7 #304CB7 #5830B7

triadic

#304CB7 #B7304C #4CB730

tetradic

#304CB7 #B7308F #B79B30 #30B758

square

#304CB7 #B7308F #B79B30 #30B758

split-complementary

#304CB7 #B75830 #8FB730

monochromatic

#172456 #233887 #304CB7 #526DD2 #8396DE

Accessibility & contrast

On white

7.39

#304CB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#304CB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB7

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB7	#FFFFFF	#000000	##FFFFFF
##304CB7	1.00	7.39	2.84	7.39
#FFFFFF	7.39	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBB

Deuteranopia (green-blind)

#0050B5

Tritanopia (blue-blind)

#00677A

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #304cb7;
/* rgb */ color: rgb(48, 76, 183);
/* oklch */ color: oklch(46.2% 0.172 267.8);

Tailwind

colors: {
  custom: {
    50: '#7b7dcd',
    500: '#304cb7',
    950: '#000000',
  },
}

SCSS

$custom: #304cb7;
$custom-light: #7b7dcd;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb7",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 183
  },
  "hsl": {
    "h": 227.556,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.46204,
    "c": 0.17223,
    "h": 267.8
  },
  "luminance": 0.09216
}

Semantic roles & 50–950 ramp

primary

#304CB7

secondary

#C8B87B

accent

#C146E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304CB7

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

Preview Lab → · Contrast checker → · Palette generator →