ORIGIN: from chromo- -asia  Modern Latin  ending on Greek  model (cf. -plasia , -stasia , etc.) for nouns with a stem -at-: see -ia 1
-chro·ma·sia
\krōˈmāzh(ē)ə\  noun combining form 
(-s) 
Etymology: New Latin, from Greek chrōmat-, chrōma color + New Latin -ia 
1. : color 
< achromasia >
2. : stainability : colorability 
< polychromasia >
1.
< achromasia >
2.
< polychromasia >