Here's how styling works in Slides With Friends decks, so you can make your deck look exactly how you want.
Backgrounds
You can add images to your background, or have them be blank (by removing a background image). The "picture" icon on the top menu and the side menu controls the backgrounds for each slide.
Colors
The color themes apply to background image color, text color, and secondary colors (like the graphs in a poll, etc). We've created these palettes to help make it easy to make pretty designs (so you don't have to do your own color matching).
To make a solid color background, you can simply remove the slide image background in the background settings (see above)