Someone else who doesn't understand the rainbow

Rainbow bubblegum packaging

According to Sir Issac Newton a rainbow contains seven colours; Red-Orange-Yellow-Green-Blue-Indigo-Violet.

So, no Light Green, no Pink and no White. And it is not as if you can't find something that could logically be purple. How about grape bubblegum? And what is even sillier is that the little coloured circle after the "W" includes purple.

I know it is a small thing, but it does drive me crazy. (And I don't get into how some of the lettering colours match the gum really well (Yellow, Light Green, and Green) and some are horrible (Red and Blue).)