One suggestion would be to look at DalTile mosaics. You can build your own custom blends to order. So you could pick 70% white, 20% black, 10% blue. That would be something a homeowner could have done in the 1950s. http://www.daltile.com
Their website is bad and their customer service is worse IMHO, but they do have the authentic tile used in original MCM homes.

Another route you could take would be to get cement tile floors in custom colors. Granada tile has a gorgeous blue pigment. You could design a pattern using blue/black/white from them. They have several geometric patterns that I think would work well in an MCM home. Their customer service is very good.
http://www.granadatile.com

Thank you, ChristaM!

To clarify, I am not looking to incorporate blue into the tile pattern, only black and white. The blue comes form the tub :).

I'm going now to check out the granadatile site!