Change Colors of Background

We have several people that work in more than one company in Passare. It would be so helpful if we could customize the background colors (the blue) in the companies to differentiate them at a glance. We frequently have cases created in the wrong company. The ability to customize the view settings would eliminate the problem and save a lot of time that's spent copying and deleting cases. If company "A" was purple and company "B" were blue you'd know at a glance which one you were working in.