Blackberries - technically, they are a very dark purple and make things purple when you break them down into other food dishes.
Planet Fitness - Purple is a big part of their color scheme. I know there are mixed feelings out there on them as far as gyms go, but I much rather pay their prices that the hundreds per month the rest of the gyms in our area charge...in addition to the whole no contracts things.
Pants - I recently bought a pair of purple compression exercise pants. I was a bit iffy on the color but they actually match a tank top I've owned for several years that never quite went with anything.