From the (Ukrainian) frontman, Eugene Hutz:

"It's one of the very few songs I wrote for a girl. I just moved in with my girlfriend in New York. We had a neighbour: an old woman who was always dressed in purple head to toe. She was clearly bonkers. So whenever my girlfriend and I had an argument and she would start screaming at me, I would say: you might as well start wearing purple now."

source: https://archive.is/pQRd