I won't comment on colors because I think they are such a personal choice. In my opinion I think more contrast is needed. Whatever color or maybe 2 colors you want to have the loudest voice(s) need need at least a dark shade to strengthen it (them). For example the brown or green or peach/orange (hard to be sure on a computer)- picking one or 2 and finding a dark fabric to give more contrast. I would also pick at least one and add a very light shade of that color. That's my 2 cents.