It's a very clean design. Honestly, I think there's just too many different colours, it's just sort of too 'bright' if you get what i'm saying. I think it might look a bit better if you kept the colours the same in each box, i.e. In the support tickets box, only use purple for the circles and in staff online only use red etc. Don't get me wrong, this design looks amazing and this might just be my personal preference. (I have no experience in designing user interfaces, I'm just stating my opinion directly as if I was a user of this system). Other people might like the colours!