The Voynich Ninja

Like most things Voynich, these "rainbows" look rather strange. They consist of four or five bands, one colored blue and another green.
They are not tube-like, distinguishing them from similar bows in the MS.

So well, I wonder, could these actually represent rainbows? Has anyone found comparative images?

I started this thread because I saw this rainbow in the Wiener Genesis, which reminded me of the VM style. But that's all I've got for now.