Why has the RR vs RCB game been dubbed the ‘Pink Promise’ match

Match No.19 of this IPL, between RCB and RR, is being called a "Pink Promise" match, dedicated to women-led transformations in the state of Rajasthan, the home base of the Royals franchise. During the match, the Royals have announced a unique commitment: for every six that is hit by both teams, six homes will be powered with solar power.