Indigo? Jackie

We might ask, " When does indigo stop being blue and turn into purple? When does navy blue stop being navy blue and turn into royal blue?"

And then there's that navy blue that is so dark that it actually looks almost black.

Back to indigo: I have a photograph of indigo paper used around a sugar cone that of troy taught me about. The indigo paper around the sugar cone there doesn't look indigo at all (on the Roy. G. Biv scale)--it looks more like a royal blue.

This subject often becomes subjective. Still, it's interesting to hear people discuss how they see colors.