Your van is neutral. What color do you like? Blue, green, a plaid.

Trust me, if I got something I like I'd probably screw up the color coordination. That's why I come ot the experts at Houzz ;-)

Does the bed fold up, if so the color of your sheets don't matter, but the color of a coverlet would. If it folds up I would show a picture of it folded up.

The vans interior reminds me of a boat...perhaps blue and white nautical style bedding might suit.

What kind of bed setup is that? Looks like some kind of diy folding van bed maybe? I’ve been researching options like that lately - trying to find something compact that still works for everyday use.