Spraying color Hilbert 1

What is color? Of course, examples of colorful objects are not hard to come by (Fig. 1 provides numerous examples), so the question itself is slightly puzzling, suggesting that some confusion needs to be cleared up or ignorance enlightened. But how could anyone (who isn't blind or totally lacking in color vision) possibly be confused about what color is? After all, if we learn anything about the world merely by looking at it, it's the colors of the things we see. How could we do this if we were confused about or ignorant of the nature of color? We might be confused Spraying color BLOCKINHilbert 1 Fig. 1 Atoms Inside Balloons