Thank you so very much, there have been so very many wonderful suggestions. I went and chose a tan for the plain blocks...I think it will work okay. It is just a little lighter than the tan in the blocks and has a kind of yellow hue to it it that I like.
And will move a few of these around based on suggestions. planning on sewing some more on Sunday, and will post pictures. Thank you so much for taking the time to give me your opinions. It means a lot to me!!!