Not the original color (4)
I believe the answer is:
dyed
'not the original color' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dyed that I've seen before include "(Of fabric) coloured" , "Stained with a new colour" , "Artificially coloured" , "Changed the colour of fabric" , "Imbued with artificual colour" .)