#304BBB#304BBB

#304BBB is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.4% C 0.179 H 268.1°. Best body text is #FFFFFF at 7.37:1 contrast (WCAG AA passes).

Color values

HEX	#304BBB
RGB	rgb(48, 75, 187)
HSL	hsl(228, 59%, 46%)
HSV	hsv(228, 74%, 73%)
CMYK	cmyk(74.3%, 59.9%, 0%, 26.7%)
CIE-LAB	lab(36.46, 29.53, -61.90)
CIE-LCH	lch(36.46, 68.58, 295.50°)
OKLab	oklab(46.35% -0.0058 -0.1787)
OKLCH	oklch(46.35% 0.179 268.1)
XYZ	xyz(12.7015, 9.2470, 48.1195)
Luminance	0.0925 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304BBB #BBA030

analogous

#3090BB #304BBB #5A30BB

triadic

#304BBB #BB304B #4BBB30

tetradic

#304BBB #BB3090 #BBA030 #30BB5A

square

#304BBB #BB3090 #BBA030 #30BB5A

split-complementary

#304BBB #BB5A30 #90BB30

monochromatic

#17245A #23378A #304BBB #556DD3 #8697E0

Accessibility & contrast

On white

7.37

#304BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#304BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304BBB

7.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304BBB	#FFFFFF	#000000	##FFFFFF
##304BBB	1.00	7.37	2.85	7.37
#FFFFFF	7.37	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBF

Deuteranopia (green-blind)

#004FB9

Tritanopia (blue-blind)

#00677B

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #304bbb;
/* rgb */ color: rgb(48, 75, 187);
/* oklch */ color: oklch(46.4% 0.179 268.1);

Tailwind

colors: {
  custom: {
    50: '#7c7dd0',
    500: '#304bbb',
    950: '#000000',
  },
}

SCSS

$custom: #304bbb;
$custom-light: #7c7dd0;
$custom-dark: #000000;

JSON

{
  "hex": "#304bbb",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 187
  },
  "hsl": {
    "h": 228.345,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.4635,
    "c": 0.17883,
    "h": 268.1
  },
  "luminance": 0.09248
}

Semantic roles & 50–950 ramp

primary

#304BBB

secondary

#C9BB7D

accent

#C445E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304BBB

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

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