My first and only comic as a child was X-Men #4, but for some reason, I have this memory of seeing Omega Red fighting alongside someone almost identical, but Blue. I have a feeling his name was Alpha Blue (of some other greek letter), but since rediscovering comics, and hence, rediscovering Omega Red, I can find no reference what so ever to this mystery ally. Does anyone have any idea where the hell I got this memory from?

i won that comic, so let me go find it.

 I personally have long suspected a connection between Omega Red and the Soviet operative(and Defenders ally ) Seraph. It seems more than pure coincidence that they are both super powered albinos born in the same country.
 
Terry

In Xmen #4 there was no partner for Omega Red. In Xmen#5 they teamed him up with Sabertooth to track down Wolverine, after Maverick helped Wolverine escape from the fenris twins, the Hand, and Omega Red. We also first hear/see Birdy and the name Victor Creed for Sabertooth.

Omega Blue i believe is the Age of Apocoylpse version of Omega Red, because he had a blue costume in AoA.