I can relate to this question, however, you are making a quilt for someone who believes you can make them a beautiful quilt with "their" favorite colors/fabrics. I once was asked to make a quilt for an elderly friend of mine, who had sewn strips from all her past sewing projects over the years. Besides all the wild colors and fabric designs, she asked that I sash the strips with RED. I divided the strips into equal lengths and widths, then cut the red sashing. equal size, similar to a coins quilt. Many years ago I saw a quilter on a quilt show whose house and quilts were all in bright primary colors and she explained that she used red as a neutral color in all her quilts. While I was making the quilt, my mantra was "red is a neutral", "red is a neutral", and when it was finished, my husband and son told me it was a great quilt and she was thrilled. Remember, it is her quilt and when it is finished you may be surprised that the quilt has "grown" on you. Happy quilting.