Some generally informations about colors of parts....parts often came from different manufactures so its not possible to matching colors 1:1 with other parts! Also parts made of different kind of materials, ABS, PVC, Melamin, Acetate Butyrate and Cellulose Acetate Butyrate (CAB).
Also in case of the overall production colors vary slightly from Lot to Lot, in case of manufactures often reuse the materails which remaining from the production to safe material and costs finally. Otherwise parts cost much higher prices.
So note also if the Parts name the same definition of color they vary always!