Different colors or skins for different instances

When I run multiple instances of MF, it is not easy to know which instance I am looking at. An option to change the background / title / tab color or the entire skin would be a great help.

However, I'd prefer to keep the betting interface in the standard colors.

With each instance in a different color it would be easy to know exactly which one I'm looking at.

Some colors (not the skin) are part of the profile and could be adjusted from the settings -> Look and feel. At that page you can set to show your username in the program title.