Blue colour code

Text contrast

With white: 8.59:1 · With black: 2.44:1

Normal text needs 4.5:1 for AA; large text needs 3:1.

Use Blue in CSS

Copy this background and text pairing into your stylesheet.

.colour-blue {
  background-color: #0000FF;
  color: #FFFFFF;
}

Use the HEX value for a consistent digital reference. Descriptive colour names can vary between collections and are not always valid CSS keywords. This code does not identify a paint, fabric or print specification.

Using Blue

Try it for navigation, diagrams or a palette inspired by water and sky.

This pairing uses #FFFFFF text on #0000FF. Results apply to solid colours; recheck contrast if you add transparency, imagery or effects.

Colour companions