User blog comment:ReverseZoom101/Season 4 Thoughts/@comment-32593680-20170821195211

Ok so, Hunter had yellow because he was running slower while using V-9, it was alluded to in the episode. It could also be due to him re-establishing his connection after his formula cut it off almost completely. The flash ring, idk. They've been holding off on it even though they don't have to use the animation often.

And Barry is 28, and 29 by the end of the next season. Joe mentioned his age in 3x21.