It happens to all of us - I don't have a good imagination when it comes to color, tend to buy what I like, then when it gets home, gets washed and in to the block there is some bizarre change and I wonder "what was I thinking?" when I bought it. So I have been known to take the blocks apart and get another fabric, if it is the pattern of the block then will scrap the entire project. My hardest projects were making an Oakland Raiders quilt for my daughter's friend and then a SF 49'ers quilt for a friend of mine. (Kept feeling like a traitor to my San Diego Chargers.)