Can you change IntelliJ colors on per project basis?

Question

I often have 2-4 projects open at the same time in IntelliJ IDEA 15. It quickly becomes confusing switching between them, especially when classes are similarly named. Is there a

Answer 1

My solution is based on the above - where I created a 1px x 1px coloured png and used it as the background image at.. Preferences > Appearance & Behaviour > Appearance and there's a button 'Background image' .. But .. I found that resizing my project window caused a huge lag in refreshing it to the new size. .. So .. I tried with a 200px x 200px image and resizing now works as normal. Make sure you also tick the 'This project only' option.