In the words of Brittany McMillan, who organized this event:
"It’s been decided. On October 20th, 2010, we will wear purple in memory of the recent gay suicides. Many of them suffered from homophobic abuse in their schools or in their homes. We want to take a stand to say that we will not tolerate this. Purple represents Spirit on the LGBTQ flag and that’s exactly what we’d like all of you to have with you: spirit. Please know that times will get better and that you will meet people who will love you and respect you for who you are, no matter your sexuality. Please wear purple on October 20th to remember all the lives of LGBTQ youth that have been lost due to homophobia. Tell your friends, family, co-workers, neighbors and schools."
(I'd be wearing purple too, if I had any, but at any event, more people will see my blog than see me...)