/cgl/ - Cosplay & EGL

Currently working on making this suit. Everything is going swimmingly, but the accent stripes are perplexing me. My initial thought was to use bias tape, but I think the folds underneath look too prominent. Not sure if the grain on a ribbon would look tacky with the grain of the suit as well.

As far as sewing on the stripes, I already have the sleeves sewn on the jacket so I was planning on just sewing the stripes around the finished arm holes as it is. would it look cleaner to take off the sleeves and sew the stripes around the arm holes first? I would like to avoid that if possible since I spent a ridiculous amount of time making sure the sleeves set perfectly.

Thanks!