Jim writes this:
>So, consider painting triangles, squares, circles, and stars,

Not to get too far of the subject of colors, but shape also has an effect
on what bees can distinguish. A solid circle, solid square, or a solid
triangle are all seen by bees as the same shape. Also shapes like “X”, “Y”,
or “IIII” are perceived as identical shapes by bees. At least according to
what E.O. Wilson writes in “The Insect Societies”

Regards,
Dick Allen