Blue
#0000FF
Blue (#0000FF) is a medium, vivid blue colour, cool. In RGB it is 0 red, 0 green and 255 blue; in HSL its hue is 240°, its saturation 100% and its lightness 50%. For print, its CMYK mix is 100% cyan, 100% magenta, 0% yellow and 0% black, though printed colours vary with paper and ink.
Blue is the most-used colour in brand logos. It reads as trustworthy, calm and capable, which is why banks, tech firms and airlines choose it.
Text on blue
White text on blue has a contrast ratio of 8.59:1 and passes AAA; black text has 2.44:1 and fails. White text is the better choice on it. Check other pairs in the contrast checker.
White text · 8.59:1
Black text · 2.44:1
Tints and shades of blue
Colour palettes with blue
Brands with a blue logo
Brand colours close to #0000FF, from our Brand Colour Index.
Colours similar to blue
Use blue in CSS
.button {
background-color: #0000FF;
color: #FFFFFF;
}Make a full Tailwind scale from it with the Tailwind shades generator, or see more shades of blue.