Wow I rlly like the icons and all. The min/max/close buttons definitely looks a little out of place... How about giving it like a similar colour theme (like the one mac has: red/yellow/green). In your case, since your vs is somewhat monochromatic-ish...how would it look like with that blue-ish grey you have like the one in your icon and then fade it out into a grey or the white itself? It'll be like:
Close: Blue-ish Grey colour Maximize: Grey with a very light tint of blue or even none Minimize: white (original colour you had on all three buttons)
Just an idea that popped up in my head being thrown out haha. Nonetheless though, great work!