It's obviously a work in progress. It's not based on any specific Robin, rather it takes elements from a couple different versions of Robin and mashes them together.
First on the list is to make some elbow-length gloves, probably out of the leftover gold fabric from the cape.
Then some black boots and a mask.
And then probably a new belt and a long sleeve black shirt.
NOTE: The person wearing the costume is not the person it's designed for.