I am no friend of styles or skins for applications. But it seems that others like it...
With the current beta release of PhonerLite (2.24beta) there is a possibility to support special skins. You can download such skins here: http://poptrayu.sourceforge.net/visualstyles/
If you have downloaded and extracted the files, you can copy one of this .vsf file into the PhonerLite folder and rename it to "style.vsf". At next startup PhonerLite loads that "style.vsf" and you see different colors...