I am not a purple person but I am totally drawn to prune. I tried on the Picotin PM with lock and the Picotin PM3 (and a Lindy 30 cm too). I loved all of them and would have gotten the Evelyne except I am not a fan os the adjustable strap.
Anyhow, I see it as a neutral with a pop. I can see it worn with whites, denim, blacks, browns and def. year-round. I plan to wear it all the time once I get mine.
Good luck!