The sequence of colors red, orange, yellow, green, blue, and violet may be remembered by memorizing the name of that fine fellow "ROY G. BV". This was originally "ROY G. BIV", because it used to be common to call the region between blue and violet "indigo". In modern usage, indigo is not usually distinguished as a separate color in the visible spectrum; thus Roy no longer has any vowels in his last name.
Is nothing safe? What's next? My guess is they're eyeballing February. It never did fit in with that "30 days hath September" rhyme.
Now I would like to tell you that when we came to this point in our Noah study, we stood up and said "NO! We will not participate in this blatant, revisionist color snatching!" But those dot painters don't come in indigo. And you can't really mix them. Well, you can but the applicator tips get all messy and then the three year old wants to mix all of them and then the yellow actually paints green and he cries because he wants yellow and it's just chaos, I tell you!
So here is Little Man's masterpiece: