I don't know if it is a 'standard' or not but I usually go with monochrome 14 or 12 awg 'zip cord' and rely on the 'rough is red' method to tell them apart. Usually one side will have little ridges down the length of the wire. I don't know about Monster or the other brands - this is strictly el-cheapo-per-foote brand.

-Brian

2xM60ti, 2xM3ti, 2xQS4, VP100, EP350, N2's