Why do devotees wear all pink clothes for the St. Mary's feast that is currently on in Bangalore?

Question

This is the annual St. Mary's feast held at the St. Mary's Basilica at Shivajinagar in Bangalore. The feast started roughly about 100 years ago when Bangalore was affected by plague. Was asked earlier in answers by a friend but got no proper response.

Answer 1

why do devoties who go to shabrimala kerala wear black and redish cloth...its a faith... leave it to them..its their belief, if you like to wear you also do the same...