I guess it would be considered a theme change. Basically I wanted a different color scheme then what is loaded by default, which is the green numpad and black background. I thought if I applied a new wallpaper it would give an option to change it, but that was not the case. I am sure there is an app available for such a thing, I just wanted to check if there was a settings change I haven't noticed.
Thanks for the replies. I think I will look into other options since I haven't rooted the phone, and I don't feel too confident to do that quite yet, since I am new.