Blue and Purple are on the end of the light spectrum, I consider violet and purple to be the same colour. The blue part of light has a higher frequency, this means the photon undulates more often as it travels. It takes more energy to make blue light than red light and the blue light is doing more but we see blue and purple as the dim colours.
Perhaps blue light has trouble passing through the lenses of our eyes, ultraviolet light can't pass though at all. I think ultraviolet light isn't violet, it is a colour we can't imagine but it is a higher frequency than purple and it undulates so much that it gets deflected by the lenses in our eyes so we never see it. I wonder if something similar is true for blue, perhaps only some of it can pass through our eye lens so that is why it appears dim. Or perhaps the retina cells can only detect part of the light ray so the nerves get a weak signal. Or perhaps our brains make blue and purple light dim because it is more important to see red and green than blue and purple. I don't know where blue goes dim.
In the lens, in the retina or in our minds? I wonder if we know that blue is brighter than red and if it appears more bright after reading this post. Where is it Dim?
I am British so I spell color as colour, my apologies to American readers.
