The hexane layer turned a dark violet and the water layer turned a bright yellow which may be KCl.. or more I2?
KCl solutions are clear always.
KI solutions are opaque, turning bright yellow with air oxidation. This is concentration dependent. Very dilute solutions of KI seem clear but may turn bright yellow with air oxidation of KI to I2 and small amounts of KIO3
Also KI helps to make I2 more soluble in water.
Look at the physical properties of KI in Merck Index.