onBackground property

Color? onBackground
final

A color that is clearly legible when drawn on background color.

To ensure that an app is accessible, a contrast ratio of 4.5:1 for background and onBackground is recommended. See www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html.

If null, the on color is derived from the brightness of the background color, and will be be black if it is light and white if it is dark.

Implementation

final Color? onBackground;