search angel for washington state

Hi, I've been thinking about finding my father's birthmom or dad or any family. My father and his adoptive parents have passed away but I still wonder what his birthparents were like. I know they loved each other but biracial marriage was not allowed in the South in 1946 so she was sent to a pregnant girl home in Spokane, Washington. My father was born on April 26, 1946. If you can help, I will give you his name and the name is birth mother choose for him.