I understand your question. I make baby quilts for nieces and nephews children with the same idea in mind. I make any pattern I want and use any color pattern I want. Who says that a baby quilt must be in pastels and be covered with little baby animals? Well, it can be but it there is no rule that says it must! I have made quilts that are turquoise, colors of the brown, orange, yellow pallet and others that are black/white/red. Some times the moms ask for a color choice but most just do not. Bottom line, give the beautiful gift that you wish. I like the idea of choosing a favorite pattern and bless this little one with a warm snuggle from you.
I am particular to half-square triangles, light and dark in the barn raising arrangement. HST makes a good use of scraps and can be arranged is just so many different ways! Have fun and snuggle this little boy with your quilt and get a picture of you, child and quilt together. It may be a memory maker!