I would thought even more useful is assign powers of two to each colour/band (1, 2, 4, 8...) so that you know which bands were in and out of play, in case you w

I would thought even more useful is assign powers of two to each colour/band (1, 2, 4, 8...) so that you know which bands were in and out of play, in case you went to more of them and wanted to extract more complicated data.