QT. create and implement three design skins for an QT application that will run on iPhone /Android -- 2

I have a QT application that is functional. No need to make any functionality changes. I need you to create and implement three design skins that will make my application UI user friendly and appealing for iOS (iPhone) / Android (Samsung Phones). 1. Color combination. -Theme 1. - Dark background (Black background / white foreground) -Theme 2. - Dark background (Black background / orange foreground) -Theme 3. - Bright background (White foreground / Black foreground) -User must be able to change the color combination from the menu. This will be saved with the application settings. 2. Buttons, check boxes, radio buttons, tables, lists, progress bars, text boxes, drop downs, etc. must be sized and designed according to the current mobile friendly standards. 3. Application has only a 6 windows