The following are the colours' allocation of S/s 2003, F/w 2003 and F/w 2007.
It is clealy that Marc Jacobs likes the colours in red and blue hues. Those colours are near to primary colours but there are always slight differences. Colours are getting richer as the later collections are designed. Sharp and dark greens are rarely used in collections.However pastel green often appear in other fashion products of Marc Jacobss.