Mystic Blue Siding Westbury posted by Alpha Windows & Siding October 18, 2015 under Siding Long Island, Windows & Siding Long Island Mystic Blue Siding, Shake Shingles, Siding Westbury Here we sided this home in Westbury with vinyl Mystic Blue Shake shingles. The only secondary color used was white, which kept the home’s color scheme light and gentle. Along with the light gray colored roof, this home’s color scheme blends well.