Black to white crosses may or may not yield blue, and it depends upon whether the white bird also carries the dominant BL (blue) gene in addition to two copies of recessive white. Recessive whites (which white Ameraucanas are/should be) can cover over many other color genes. Other desireable color genes to be strived for in producing great whites (without brassiness) inclue sex linked barring, sex linked silver, and BL. All of these will help to produce good, clean whites. The effect is cumulative; the more of these you have present in your flock, the more your whites will start off and stay a nice snow white. Maybe there are some color experts out there that can name some other helpful genes in producing whites?
Johnny, for your rooster I would try to find B.B. Red Ameraucana (non-standard color) female(s). If you can\'t find any of those, go with silver. The female offspring from your red pyle (at least some of them) with silver females, should yield some red pyle pullets. Then mate those pullets back to their sire, and you will have a good start for a line of red pyles. Good luck!