#304EBB#304EBB

#304EBB is a mid, vivid blue. Relative luminance 0.097; OKLCH L 46.9% C 0.175 H 267.4°. Best body text is #FFFFFF at 7.16:1 contrast (WCAG AA passes).

Color values

HEX	#304EBB
RGB	rgb(48, 78, 187)
HSL	hsl(227, 59%, 46%)
HSV	hsv(227, 74%, 73%)
CMYK	cmyk(74.3%, 58.3%, 0%, 26.7%)
CIE-LAB	lab(37.23, 27.57, -60.64)
CIE-LCH	lch(37.23, 66.61, 294.45°)
OKLab	oklab(46.93% -0.0079 -0.175)
OKLCH	oklch(46.93% 0.175 267.4)
XYZ	xyz(12.9098, 9.6636, 48.1890)
Luminance	0.0966 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EBB #BB9D30

analogous

#3093BB #304EBB #5730BB

triadic

#304EBB #BB304E #4EBB30

tetradic

#304EBB #BB3093 #BB9D30 #30BB57

square

#304EBB #BB3093 #BB9D30 #30BB57

split-complementary

#304EBB #BB5730 #93BB30

monochromatic

#17255A #233A8A #304EBB #5570D3 #8699E0

Accessibility & contrast

On white

7.16

#304EBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#304EBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EBB

7.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EBB	#FFFFFF	#000000	##FFFFFF
##304EBB	1.00	7.16	2.93	7.16
#FFFFFF	7.16	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBF

Deuteranopia (green-blind)

#0051B9

Tritanopia (blue-blind)

#00697D

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #304ebb;
/* rgb */ color: rgb(48, 78, 187);
/* oklch */ color: oklch(46.9% 0.175 267.4);

Tailwind

colors: {
  custom: {
    50: '#7c7fd0',
    500: '#304ebb',
    950: '#000000',
  },
}

SCSS

$custom: #304ebb;
$custom-light: #7c7fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#304ebb",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 187
  },
  "hsl": {
    "h": 227.05,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.46929,
    "c": 0.17516,
    "h": 267.4
  },
  "luminance": 0.09665
}

Semantic roles & 50–950 ramp

primary

#304EBB

secondary

#C9B97D

accent

#C045E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #304EBB

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

Preview Lab → · Contrast checker → · Palette generator →