Function mergeControlBarColors

mergeControlBarColors(userColors?: Partial<ControlBarColors>): ControlBarColors
Merges user-provided colors with defaults.
Parameters
- OptionaluserColors: Partial<ControlBarColors>
  Partial colors to merge with defaults
Returns ControlBarColors
Complete colors object with user overrides applied
Example
```
const colors = mergeColors({ leaveButton: '#ff0000' });
```
- Defined in react-ui/src/control-bar/defaults.ts:458