When you are ready to do a load of laundry, turn the pants inside out to minimize color loss caused by the friction from rubbing against other clothes, then choose a short, delicate cycle. “The colder the temperature, the better, since warm water tends to break down fibers and fade clothes faster,” says Steve Boorstein, author of The Clothing Doctor’s 99 Secrets to Cleaning and Clothing Care. A specialized detergent for cold-water loads,helps neutralize the color-sucking chlorine that can be found in tap water. Then hang or lay the pants flat to dry; don’t throw them in the dryer. And the next time you’re in the market for black trousers, look for a fabric that retains dark dyes, like a washable wool blend or nylon, as opposed to acetate or linen.