Disney Imagineers use two primary "invisible" colors to manipulate guest perception: Go Away Green and Blending Blue. "Go Away Green" is a specific, dull grayish-green shade designed to blend into the natural foliage and landscaping. It is used on anything Disney doesn't want you to notice, such as utility boxes, fences, trash cans, and the massive show buildings that house rides. "Blending Blue" is a grayish-blue shade designed to match the specific color of the Florida or California sky on a typical day. It is used on the upper sections of tall structures, like the Guardians of the Galaxy building, to make them "disappear" into the horizon. These colors aren't available at standard hardware stores; they are secret formulas used to maintain the "magic bubble" by hiding the industrial infrastructure of the parks from the casual observer's eye.