Colors per 950 CMR 34.00: COMMONWEALTH OF MASSACHUSETTS FLAGS, ARMS AND SEAL SPECIFICATIONS 
https://web.archive.org/web/20170203114720/http://www.mass.gov/courts/docs/lawlib/900-999cmr/950cmr34.pdf
"white = 70001 (White) 
gold = 70068 (Spanish Yellow) 
blue = 70087 (Royal Blue) 
green = 70168 (Irish Green) 
(3) In any painted or printed reproduction of the Massachusetts coat of arms, other than on the state 

flag, metallic gold and metallic silver may be substituted for golden yellow and white, respectively. "
Own work
Skunkcrew