The Borg are all races and Romulans, though majority portrayed as white, likely have multiple skin tones the same way the Vulcans do. Though the idea they purge

The Borg are all races and Romulans, though majority portrayed as white, likely have multiple skin tones the same way the Vulcans do. Though the idea they purged different skin tones at some point fits with their overall narrative. All the Dominion races were white, more or less. The Changelings have a whole meta commentary going for them.