Yes, he definitely looks to be in the blue stage. Also, if I'm not mistaken, I see a dented eyecap. If you didn't know, dented eyecaps are caused from low humidity. Along with the digital thermometer Kaorte recommended, try and get a digital hygrometer, as well. The Acu-rite digital weather station will have both a temperature reader, as well as humidity. You can get it at Wal-Mart for $20-$25.

For now, just spray the tank a couple times a day to keep his humidity up.

PS: Heat lamps suck out tons of humidity. So if you can, try to keep the tank at the proper temperatures without a lamp.