This armless design with a simple seat cushion draws the eye to the pattern, not the sofa.
A bright red nautical stripe works well with a sofa that isn't too fussy, like this Brighton Sofette from Pottery Barn. Add it to the end of a bed or corner of a bedroom for a nautical accent, or use one or two as dining seating in a country kitchen.
Brighton Sofette in Red Nico Stripe. 36" h. x 48" w. x 32" d. $499. At Pottery Barn.