iOS equivalent to androids colors.xml -

i'm developing app different brandings share same codebase parts. in android project, got xml file every branding containing colors. every view used color codes defined within these xml files instead of using 'hard coded' color codes.

i achieve same thing within ios. how can this? prefer solution not involve dragging references view controller , set colors via code. possible xcode?

please click on view , check background.click on dropdown , check other... present , click on follow screenshot attached.