How about traditional pastels: pink, blue, yellow, mint green, lavendar, You could do those as your lights and then a rose, deeper blue, gold, sage green, purple as your darks....just a thought. By the way, God bless you for pursuing adoption. I was adopted as an infant over 50 years ago and I thank God for my adoptive parents and my birth mother who was strong enough to make a hard choice for her baby. Praying for you through your journey.