I would make a yellow quilt to go with the green, that's always acceptable and non-gender. OR you could make black and white quilts, one with red as a pop color and the other one bright yellow with the black and white. This is only a suggestion. We were just blessed with a new great-nephew, had a jungle quilt made,then talked to grandma tonight and she said they did the baby's room in farm animals. Oh well, back to my stash to see what I have.