Popular music: black
"Race" (R&B and Gospel): orange
Semi-classical instrumental: blue with blue label
International: blue with black label
Of course, this was mostly only seen in the United States…and, being American where being cheap always seems to end up ruling the day with big corporations, the colored vinyl was mostly phased out fairly quickly except for special releases. However, for some reason, red for classical and especially yellow for children’s records were still a common sight even into the 1970s.