I am looking at getting a Mach 1 were there only 3 different colors? Red Blue Silve ???

 

I think the list below is correct, but I welcome corrections and additions. I will consult my Red Book when I find it and make changes as needed.

For 2003:
Torch Red
Azure Blue
Dark Shadow Gray (though I recall this actually being Mineral Gray)
Black
Zinc Yellow (2003 only)
Oxford White

For 2004:
Torch Red
Azure Blue
Dark Shadow Gray
Black
Screaming Yellow
Competition Orange
Oxford White

 

^ list is correct