labelColor property
Optional explicit color for the button label.
When null, the label uses the configuration's natural foreground:
CNButton.tint for non-filled styles, white for filled /
borderedProminent / prominentGlass / prominentClearGlass.
Set this to override that decision. The same colour is used on light
and on dark glass; use labelColorLight and labelColorDark for one
colour each. A button with a glassEffectUnionId or glassEffectId
ignores it.
Implementation
final Color? labelColor;