 Ask Sherwin-Williams and get 30% off Duration and Super Deck products May 17th through the 20th. That means 30% off our most popular color family, blue. Psychologists have found it to be soothing and relaxing, which makes it especially great for bedrooms and bathrooms. And, of course, get 30% off all of our other colors. Shop the sale online or visit your neighborhood Sherwin-Williams store. Retail sales only. Some exclusions apply. See store for details.