Ok, one think you can do it go to your materials space which is at the bottom of the display when you open C4D. Go, file->new material. Then you double click the new material that appears, and a window will poop up. Go to the color settings, double click the color white, or change the slides to get the color you want. Them you close the window. You then drag the material onto your render in the objects palette top right.

That is just a simple way to get the most basic of colors into your render.