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.
Cumberland River. Cumberland River, river formed on the Cumberland Plateau by the confluence of Poor and Clover forks in Harlan county, southern Kentucky, U.S. Looping through northern Tennessee, it joins the Ohio River after a course of 687 miles (1,106 km) at Smithland, Ky., 12 miles (19 km) upstream from the mouth of the Tennessee River.