A bull dog is on the back of their helmets.
I think it's a black NCAA Pennant decal on the left side of the helmet at the bottom.
The Patriots wore their silver helmets.
silver red and blue
I bet they're available in any color. Football helmets are very customizable and can be bought in many different colors and combinations. Riddell.com carries lots of helmets for everyone.
Brown
The bones on the back of the Georgia Bulldogs helmets is a traditional design known as "silver britches." It is a symbol of toughness and strength associated with the football team.
orange
The bulldogs were awarded white stars under Vince Dooley era (1964-88).
white
Yes, you can repaint any color helmet to any color. I have fellow teammates that take their old helmets and paint them to our orange all the time.
If you're looking for a good deal you might want to try and purchase a previously owned helmet which you can find owners selling on sites like Craig's list. Iron Horse Helmets (which is in Alabama) sells quality helmets online but also has information on motorcycle dealers and shops in Georgia. Most of the time a motorcycle dealer will also sell helmets. Check out this link: http://www.ironhorsehelmets.com/Georgia_Motorcycle_Dealers.htm