It is associated with joy, sunshine, and tropics.  Orange represents enthusiasm, fascination, happiness, creativity, determination, attraction, success, encouragement, and stimulation.  To the human eyes, orange is seen as a very hot color, so it gives the sensation of heat.
West Virginia, Ohio, Illinois, and Indiana form the northern border  of Kentucky, along the Ohio River.
Kentucky's Natural Bridge State Park is immediately adjacent to this area, featuring one of the largest natural bridges in the Red River Gorge. Because of its unusual and rugged nature, the Red River Gorge features a remarkable variety of ecological zones.