I saw it as a gradient from left to right, or centre out (radial). I also saw it cycling like you, as if the colours were two planes and one kept shifting behin

I saw it as a gradient from left to right, or centre out (radial). I also saw it cycling like you, as if the colours were two planes and one kept shifting behind the other whenever I blinked. I didn't really perceive it as a "new" colour though.