Follow what you like. I'm on my third civil war quilt now doing a block of the month. Each month I go to class and a teacher that I have the upmost respect for and love her work has picked out the fabric for the month. It's a good thing that she said early on that we make the block in the colors we want. Because I do. I have such a collection of reproduction fabrics (I do stay true to that part of the class) and I lay the colors out; sometimes take a digital picture of them together and pick out the ones I like together. Sometimes I use the ones chosen by my teacher other times I use only the ones I already have. Point is; be true to your self. Most people like certain colors together; like I like green and purples together; others may not. That is the great thing about quilting; you can let the creative side of you come thru; even if you didn't know you had one. It'll all work out. Good luck.