Spark Plugs Are Red?

My friend got bored so he wanted to see how my spark plugs looked. They are the motor craft stock platiums. He took two out and they were red at the tip. On one of the plugs it had a brown lookin subence on it in the middle where the white is on the plug.

This is what i think its from. The 110 race fuel<2.5G race fuel mixed with 6+g of 93> or the fact that i run lean up top when flooring it. What do you guys think? I upped the fuel pressure to 45psi to see if it would help up top, help it from running lean.

I'm not worry about the plugs anyway because when i get the tune i'm puttin in some NGks in.