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Yellow–teal–violet would also be readily distinguishable, by the way. These are 60° offset from red–green–blue. Might be useful if you want to use blue for something else.
It might be difficult to make lights in these colors, though. Yellow is common enough and violet is a thing, but I've never heard of a teal lightbulb.
Ideally you want the three colors to be as far apart on the spectrum as possible, i.e. red–green–blue (120° separation). Anyone who can see color *at all* should be able to distinguish those.
Here in the USA it's red–yellow–green. These are only half as far apart as they could be (60°).
But that's still better than red–orange. Those two colors are only 30° apart. That's close enough that eyes with iffy color receptors may not be able to distinguish them.
You have both red and orange? 😬 That's going to be a problem for colorblind people…