The red color family includes shades of red like bright red, pink, rose, maroon, burgundy, cardinal red and raspberry. Since red is the warmest of all colors, using wallpapers in the red color family will make your room appear cheerful, bold, dramatic and exciting. The effect of red wallpaper in a room will be to make the room appear smaller and warmer because it brings the background in closer. Putting red objects or accessories in a room will make the objects appear larger because red focuses on attention. Overall, red wallpaper will bring warmth and excitement to an otherwise cool room. An interesting and little known fact about the color red is that it stimulates appetite.