I have pretty severe red-green colorblindness. I couldn't tell the uniforms apart most of the time. Both teams had predominantly white helmets. I thought it was funny. Now that I realize that it has been in the news, maybe I should make a fuss because I am being discriminated against!
For Revis versus Sammy, I was looking at the numbers on their jerseys to tell who was who. Sammy's hair also helped.
In fact, I used numbers a lot. O-Line is mostly 60s and 70s, so I used that to determine who was offense and who was defense when Tyrod was getting chased around in the backfield. Unfortunately, I had plenty of chances to use that technique.