First off, virtually all current Magix products have basically the same screen colors which is various shades of gray but virtually no black. If you are seeing a black background to the application, then you really need to be looking at your monitor. In the screen shot below I have outlined in red all of the areas that actually have anything close to black in them. The rest is either a specific color, or some shade of gray. If you are seeing black anywhere else in this screen shot let me know and perhaps post a shot of your screen.
Yes they are shades of gray - dark gray. Very dificult to work with -unless you are a nocturnal animal :-) There should be an option to change this or change the program itself to provide a more user friendly color for people of all ages.