The original colors would not be right for me; I would be bored to death before the top was finished. But --- those fabrics might be right for the recipient. I think you could probably use different fabrics in the same family (not darker, just different patterns) to add more interest. You may be trying to make it into a bolder quilt, but all that it really needs IMHO is more variety. But the first thing I would do is show it to the recipient and gets his/her opinion.