It happens to me all the time. More than once I have asked to take the fabric to a window or outside so I can see what it looks like in the sunlight. Usually the shop is okay with it - but once in a while some one will tell me they have the natural light and it won't change, but it does. My GFG has one set of flowers that look okay - but in the store the fabrics looked like a better match. No one really knows it but me - but frustrating just the same.