2014 wheel covers. Steel wheels or Alloy?

Hello, I have a 2014 four and looking for blackish wheel covers. I've read that most covers I've looked at says only fits steel wheels, not alloy. So looked what Prius had and it said Aluminum, as far as i know, thats Alloy. But a lot of the listings for covers say they are for Prius but also say for steel wheels only. What??? A lil help plz.
-J.