Most shingles today are designed to withstand the heat generated by sunlight refraction. In almost all cases, the damage to roofing is due to metal flashings or nails/fasteners (they hold heat well). This happens because of poorly ventilated systems. Venting is key to longevity. Roofing is manufactured useing pressure to bind,..you cannot prevent ageing or wheathering. Go ahead and pick your favorite color,..but please make sure the venting is at least to specs.