I strain to read the tabs in the source code editor of Visual Studio 2012. I don\'t even understand what the different colors mean? They seem totally random. Black on brown or
The colors of each tab comes from productivity power tools. For each project power tools assign a colors, so developer can easily detect a file(if contain same name) belongs to which project.
For VS 2013 & 2015 you can easily remove those color by unchecked Colors tab by project following below steps
go to Tools > Options > Productivity Power Tools > Custom Document Well > General