black26 constant

Color const black26 = const Color(0x42000000)

Black with 26% opacity.

Used for disabled radio buttons and the text of disabled flat buttons in light themes.

See also:

ThemeData.disabledColor, which uses this color by default in light themes.
Theme.of, which allows you to select colors from the current theme rather than hard-coding colors in your build methods.
black, black87, black54, black45, black38, black12, which are variants on this color but with different opacities.

Implementation

static const Color black26 = Color(0x42000000)