Colors are most important of all. To be a good, pleasant, and satisfying room, a living room should have shades or variations of each primary color red, yellow, and blue. This goes for men, too, who are notoriously uneasy in juxtaposition to pastel, fussy-feminine decor. Of course they include all the greens, shades of rose, orange, gold, and dozens of possible combinations. Beware the startling and work up from the rug or the floor color.