I'm just going to guess because I am not good at interior decoration. If the room is a small room, I think you would want to go with lighter, airier colors to give the illusion of it being larger. If you have a large room and want to make it look warmer or cozier, smaller, and homier...you go with medium to darker hughs. If you like the large room...say, 20x25, vaulted ceilings and lots of light, then neutrals and light hughs would be the ticket. Of course, furnishing add to or take away also. I watch HGTV!! Sometimes I think the color they chose was horrible until they furnished and added drapes/curtains, bookcases, etc. Let me know how I did!