My mate is a member of the The Blue Legion and says they're shitehouse
Shitehouse name; sounds like a facist battalion Mussolini might have sent to Spain in 1936...
Did a Google search on their cover photo. Comes from Argus gallery taken at 1-1 draw at Selhurst in December 2019
https://www.theargus.co.uk/news/18108610.fan-pictures-crystal-palace-v-brighton-hove-albion/