Can wallpaper help with the "vibe" even if it can’t change the temperature?

We perceive "cool" colors like blue as physically refreshing. By covering a focal wall with a crisp, white-and-blue botanical print from https://costacover.com/collections/blue-floral-wallpaper you create a visual oasis that psychologically lowers the room's temperature. It balances out the intense yellow sunlight with a refreshing "garden" feel, turning a sweltering space into a cool, shaded sanctuary where you’ll actually want to spend your summer afternoons.