Given that we agree that our eyes see color by gathering the specific combination of light waves that bounce off matter in our eyes direction through the atmosphere we are physically present in, and good luck with that one. Then armed with the knowledge of the vagaries of perception intertwined with our interpretation of said stimuli; I often find myself wondering if the waves we all agree to in our limited language as blue actually looks the same in my mind as in yours?
P.S. Never mind the varying shades, tints, hues, and flavors of colors you might name. Give me that old time RGB