With a name like Flash, the character should be flashy, with a hint of cocky attitude.
When starting this design, right off the bat I did not want a logo on his chest. I'm not a fan of chest logos, and I try to avoid them when possible. The ears, hands, and shoe treads are a different material of gold so that when he runs only those parts would leave a gold lightning streak behind.
The overall red/crimson is shinier than usual because, once again, he is flashy.