#304BB7#304BB7

#304BB7 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.0% C 0.173 H 268.1°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#304BB7
RGB	rgb(48, 75, 183)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 74%, 72%)
CMYK	cmyk(73.8%, 59%, 0%, 28.2%)
CIE-LAB	lab(36.13, 28.05, -60.07)
CIE-LCH	lch(36.13, 66.30, 295.03°)
OKLab	oklab(46.01% -0.0059 -0.1734)
OKLCH	oklch(46.01% 0.173 268.1)
XYZ	xyz(12.2793, 9.0781, 45.8957)
Luminance	0.0908 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304BB7 #B79C30

analogous

#308EB7 #304BB7 #5830B7

triadic

#304BB7 #B7304B #4BB730

tetradic

#304BB7 #B7308E #B79C30 #30B758

square

#304BB7 #B7308E #B79C30 #30B758

split-complementary

#304BB7 #B75830 #8EB730

monochromatic

#172356 #233787 #304BB7 #526CD2 #8395DE

Accessibility & contrast

On white

7.46

#304BB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#304BB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304BB7

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304BB7	#FFFFFF	#000000	##FFFFFF
##304BB7	1.00	7.46	2.82	7.46
#FFFFFF	7.46	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBB

Deuteranopia (green-blind)

#004FB5

Tritanopia (blue-blind)

#006679

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304bb7;
/* rgb */ color: rgb(48, 75, 183);
/* oklch */ color: oklch(46.0% 0.173 268.1);

Tailwind

colors: {
  custom: {
    50: '#7b7dcd',
    500: '#304bb7',
    950: '#000000',
  },
}

SCSS

$custom: #304bb7;
$custom-light: #7b7dcd;
$custom-dark: #000000;

JSON

{
  "hex": "#304bb7",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 183
  },
  "hsl": {
    "h": 228,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.4601,
    "c": 0.17346,
    "h": 268.1
  },
  "luminance": 0.09079
}

Semantic roles & 50–950 ramp

primary

#304BB7

secondary

#C8B87B

accent

#C346E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304BB7

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

Preview Lab → · Contrast checker → · Palette generator →