Of course I've been up all night! Not because of caffeine, it was insomnia. I couldn't stop thinking about coffee.
Simple fix. Buy some paint and go to town. Perhaps get some model paint or you may have some issues and you may think about sanding the pieces a bit, but this should fix your problem.
Yes I might paint some pieces purple in this case. I don't usually go to such lengths but in this case I'm very tempted to.