When the pros play Overwatch at the Blizzard Arena, it looks just like it does for you and me at home. They don’t see the team coloring of the HUD or the Visual FX. They don’t even see the team uniforms. It’s the spectator functionality and the broadcast that makes the game look that way.
You can use some color blind settings to adjust the way things look for you at home, but it’s not quite like the OWL view.