The old MAI 1200's used an ADM painted a bright
blue.  We have one of
 those, too.  I seem to remember a creme coloured one, but don'tknow if we
 have one of those. 
So, . . .
the prototype for the imac didn't have tangerine, etc.
Hmmm.  Is the iMac available in ADM3a blue?  and cream?