Lavender lights atop the Basilica

I was passing through Minneapolis and stopped at the magnificent Basilica of St Mary, first basilica in the US. I noticed the outside lights lighting the dome were lavendar. Looking online, this parish has a GLBT outreach effort. The local gay pride festival meets in a park across the way from the Basilica. I can't think there is only a coincidence here. I think this is really remarkable. I've never seen anything like it, anything so prominent.