The colors are awful, the only thing i like is the diamond icon which looks great, but the icon border, past rank banner and the armor are all ugly and look dirty. It would be much better if they used the same colors/style as in the icon. This dirty dark purple doesn't fit at all.
Also the armor being a helmet is just kind of weird and it would be better if it was just some kind of crystal or something in the middle like in the icon instead of the empty black to look like a helmet. I usually like the art from riot but this is just bad.