Classic Aero Interior Tool
 

DR posted this to the top of the main page, but Classic Aero has a new tool that allows you to visualize different color combinations for their interiors. I tried it a few times, and it's helpful, although the color tint is a little off between the different portions of the photos.

Thankfully, the tool did not let me create any really ugly color combinations. I guess this won't be The Joker's airplane ;)