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.
The Kentucky River is a tributary of the Ohio River, 260 miles (418 km) long, in the U.S. Commonwealth of Kentucky. The river and its tributaries drain much of the central region of the state, with its upper course passing through the coal-mining regions of the Cumberland Mountains, and its lower course passing through the Bluegrass region in the north central part of the state.