As for your terminal blue background it looks gorgeous, maybe you just need to tweak the palette a little bit to make sure at least 16 basic colors are contrast enough. Btw what is the meaning of :28 in your prompt? Is this amount of files changed or a revision number?
The number is the number of revisions. Helps me track how "old" different copies of the same repo is. The star next to it denotes changes (in this case the a.out)
The only other things this prompt does right now is show an error code if a command exits with one, and changes to "can't miss it" red when run as root. For me, this is a minimal prompt, I oscillate between a lot more detail, and something closer to a standard installation.