The living room is the hardest room in the house to buy art for, because it is the one you look at longest and from furthest away. Most sofas sit two to three metres from the main wall, which quietly rules out prints that depend on fine detail and rewards work with a clear underlying structure. These prints are chosen for that distance: legible at range, with enough tonal depth to stay interesting when you are sitting directly under them. Unique wall art for living room walls is harder to come by than the search results suggest: the large print shops license a design once and then sell that same file to everyone who orders it. Everything here is generated rather than licensed, and printed once the order is placed rather than pulled off a warehouse shelf. If nothing below suits the room, a new piece can be generated to your own brief — including to the colours already in it.
245 prints

Moonlit Wilderness

Serene Sunset Hammock

Impressionist Coastal Serenity

Minimalist Floral Harmony

Impressionist Seaside Harmony

Retro Coastal Maritime Poster: Modern Vintage Design with Iconic Crab and Checkerboard Background

Mid-Century Jazz Hound

Jazz Dog Groove

Cool Vibes: Downtown Jazz Dogs

Bunny Chef at Noon

Monochrome Jazz Pup

Cool Canine Jazz

Pastel Playland

Whimsical Minimalism in Blue Hues

Playful Pajama Bear in Pastel Bliss

Tranquil Pastel Harmony

Sophisticated Harmony

Moonlit Mountain Serenity

Cosmic Symphony in Gray

Monochrome Geometric Harmony

Eclectic Harmony

Harmony in Geometric Nature

Modern Botanical Harmony

Geometric Serenity
The evidence here is real but narrower than most decorating advice implies. Research on restorative environments — Ulrich's work on stress recovery, and the Kaplans' attention restoration theory — consistently finds that views of natural scenes speed physiological recovery from stress, and the effect survives when the view is a picture rather than a window, though more weakly. That supports a modest claim: in a room used for winding down, landscape and natural-form imagery is a defensible default. It does not support the stronger idea that any particular colour reliably produces a particular mood on its own.