From a priest:
Do you know what the traditional color chasuble is for priests to be buried in (i.e. not necessarily what is done now, but what was most often done in the past)?
I need to write out my will and funeral directions for the chancery files and want to be sure to do things right!
Priests are traditionally buried in purple.
According to the old Rituale Romanum clerics should be dressed if possible in cassock and the apparel appropriate to his rank also with the tonsure and biretta.
13. Sacerdos quidem super talarem vestem, amictu, alba, cingulo, manipulo, stola et casula seu planeta coloris violacei sit indutus. [Titulus VII, Caput I De exequiis]
Priests usually vest the body.
For my part, I have a purple Roman planeta (Italian pianeta) given to me years ago which will be my burial vestment. It is not usable for Mass, in my opinion, because it had been left exposed to the sun for a while, so the back is badly faded in part. But it is otherwise in perfectly good shape.
So… priests should do everyone a favor set aside the proper garb against the time.