Go Away Green is a clever paint color used in Disney Parks to blend in with the surroundings and divert attention away from infrastructure. Imagineer John Hench developed this concept, choosing a neutral gray-brown color to prevent the railing from standing out. Large attraction buildings like Soarin’ and Indiana Jones Adventure are often painted in muted greens, while necessary infrastructure like speakers and trash cans are also painted in various shades of green. This color concept extends to other colors like grays, browns, and blues for areas with less greenery. The use of camouflage-like colors is prevalent throughout Disney Parks to maintain the magical atmosphere.
https://en.wikipedia.org/wiki/Go_Away_Green