Two things to note: Firstly, Client States and Colonial Nations are currently bugged in the timelapse feature if they don't exist in the current state of the game anymore. They look like uncolonized provinces and have weird names like "K00".
Secondly, all other colonial nations show up in my color even though I didn't necessarily create them. For example, "Portuguese Brazil" was obviously created by Portugal, I just took them over after annexing Portugal. I only created three colonial nations in this game myself - in the Caribbean, Australia and Louisiana (very late through direct conquest).
For more info check out https://www.reddit.com/r/eu4/comments/5boyx6/the_three_mountains_118_one_tag_no_exploits/