The KPL plans to experiment with pink balls in its second edition.

The ICC has been contemplating it for a while and the MCC even tested the ball in an England county championship match. Now it is the turn of the Karnataka Premier League, a spin off from the Indian Premier League, that is planning to try out matches with pink balls.
BCCI Restricts KPL to Karnataka to Protect IPL
KPL Franchisees Value RS 35 Crore, Ex-Cricketers Worry
Modi Tweets: IPL With Pink Balls and Four Substitutes!
Power of Pink - All the Glitter for the Gold!
Morgan Predicts Day and Night Tests a Regular Feature in Two Years