The finals ended with Atletico de Kolkata defeating the Kerala Blasters in a penalty shootout, 4 -- 3, in the final. The match was a rematch of the 2014 ISL final which Atletico de Kolkata won as well 1 -- 0.

Based on this passage, who won the title of isl football 2016? Let's give stream of consciousness first:
To answer this question, we should know that: The finals ended with Atletico de Kolkata defeating the Kerala Blasters in a penalty shootout, 4 -- 3, in the final.
So, the final answer is Atletico de Kolkata.