Baby boy nursery 😔

I have NO idea what to do for my baby boys nursery.. I don't want a bold theme (like cartoons, nautical, etc...) I want it to be very simple with hints of motorcycle decor. I know Hobby Lobby will have some good stuff, I found 2 pieces on Etsy as well. The walls are tan (we can't paint- renting) Any ideas for the nursery furniture color? I would love grey, but it won't go with the walls. Feel free to post pictures of your simple, "no theme" nursery! I would love some ideas.