You are on the right track with the red, black, gold or dark yellow and blue, but think beyond solids and look for prints in those colors. Even the black could be black on black. The Jewel Box quilt I made with Moda Marble Swirls and a BOB does not look girly, though mine had too much pink, purple and orange for your purposes.
http://www.quiltingboard.com/picture...x-t187015.html
Batiks are another possibility. Scribbles from Marshall Dry Goods is another coordinating line. I don't care for the black, but the rest have possibilities.
http://www.marshalldrygoods.com/?gcl...FehDMgodzlkA1w
Whatever you do choose he will love it. It's time to start. Give him our best wishes and thank yous from another Marine Corps (prior) mother.