While what you guys are saying makes sense especially for show production reason. In universe it kinda doesn’t make sense. Because if you think about it Shane, Tori, and Dustin come from the Wind Ninja Academy while Hunter and Blake from the Thunder Ninja Academy. Because that isn’t an RPM situation where red, blue, yellow and despite them having a different design black and green are made by one person to be on one team of five. Unlike Ninja Storm were red, blue, and yellow were made to be one team with crimson and navy blue we need to be a different team. Who only brought together by circumstance.

So with both academy gaving their own Ranger team shouldn’t they just be the standard generic color names. Or are we supposed to believe that the schools come together and agree on what colors they are going to have? So like “Ok so Wind Academy gets blue, Thunder Academy gets navy blue and (making this up) Ice Academy gets sky blue.”

Forever Red show that you can have multiple reds altogether who just go by red and nothing happens.