http://www.pcgamer.com/blizzard-unveils-plans-for-improving-the-overwatch-viewing-experience/

In a developer update today, Overwatch game director Jeff Kaplan unveiled plans to improve the Overwatch viewing experience. 

First off, teams will now be able to have uniforms and color palettes to help differentiate from one another—in colors more varied than the red and blue tint  system currently in use. The new system will be first implemented in the Overwatch World Cup next week at Blizzcon.