Purple has many meanings,but in this case it is to support an awarness.
It also encourages people to keep fighting.

Purple can make anyone smile especialy if they have had a bad day. If purple is your favorite color then it means you are sensitive and that you think of others before you. Also that you have a personality that people are comftorable with.

Purple lights up the city at night. This is a beautiful sight too see and you would not want to miss that.

purple represents the balance of blue's stimulation.