Theme / Color Schemes

Good Afternoon.  Would it be possible to set up some sort of color/theme options for the portal?  My biggest issue is having to triple check when I am in our production environment vs our sandbox.  Sure, I can look at the url - just wanted to suggest that there would be some more options to customize the color scheme either at a user level or to differentiate between production and sandbox.  My suggestion from support was to create a new logo, which I can and will do temporarily.  

Thanks!