Hi All of the energy waves that humans are affected by are on the electromagnetic spectrum. This ranges from nuclear radiation to long-wave radio Our eyes respond to the colour spectrum which is somewhere in the middle of that. If you look at it in that way, blue is at the top of the spectrum and red is at the bottom.
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Newguestgreen also stands in a harmonious position between the red and blue ends of the color spectrum.Think of the rainbow colors. On one side is blue-violet, and on the opposite side is orange-red. Green, a harmonious color associated with balance and peace, is in the middle.