Lisa, if this is a special project, I would take a small sample of each potential white fabric to my paint store. They can look at the sample under their spectrum and tell you what colors are in the sample. This is the best way to match any white to the other colors you want to use in the quilt. I'm also an oil painter, the color of the white (and black) used can make or break a paint theme. To get the true antique feel, the white has to be correct. Good luck! I hope to see a picture later!