Kenneth L. Kelly and Deanne B. Judd.
"Color: Universal Language and Dictionary of Names",
National Bureau of Standards,
Spec. Publ. 440, Dec. 1976, 189 pages.
Color Name Dictionary: (RC) Rock-Color Chart
National Research Council,
Rock-Color Chart
This combinatorial field-work dictionary's 95 names map to 120 colors, using 89 of 267 centoids. This is less redundant than the others. Unfortunately, the focus on rock colors will not make for a general purpose dictionary.
http://swissnet.ai.mit.edu/~jaffer/Color/Dictionaries#RC