Zoom? Cobalt Blue?
Check out an international promo for The Flash Season 2, which hints at a blue Flash.
It's possible this could be an alteranate version as we see the Speedforce looks to be blue as the Flash zooms around town.
"The Flash" Season 2 premiers Tuesday, October 6th on the CW starring Grant Gustin, Candice Patton, Jesse L. Martin, Tom Cavanagh, Danielle Panabaker and Carlos Valdes.