violet
Violet.
The amount of energy is directly proportional to the frequency of the light. Since violet has the greatest frequency, it also has the maximum energy and red has the least.
The "color" is really a wavelength. The electromagnetic spectrum determines this, every different wavelength has a corresponding color. Red being the longest, and violet being the shortest. This electromagnetic spectrum also determines whether it is visible, ultraviolet, infrared, and so on.
I suspect you mean the color with respect to light. If this is the case then red light has the lowest energy of the visible spectrum. Of course visible light is just a small part of the electromagnetic spectrum, for example, infrared light has even less energy. The lowest energy would be found in radio waves. Also it is important to realize that color is just a convention, it has no real physical meaning. Some other animal might see totally different colors.
Red, I believe.
Violet.
The colors of the spectrum going from lowest energy to highest energy are violet, indigo, blue, green, yellow, orange, and red.
The amount of energy is directly proportional to the frequency of the light. Since violet has the greatest frequency, it also has the maximum energy and red has the least.
Violet (purple) is the highest energy color in the visible spectrum. It has a wavelength of about 400nm (4x10-8m), the lowest of all visible light.
Violet light has the highest energy.
The "color" is really a wavelength. The electromagnetic spectrum determines this, every different wavelength has a corresponding color. Red being the longest, and violet being the shortest. This electromagnetic spectrum also determines whether it is visible, ultraviolet, infrared, and so on.
Indigo
The color red is the longest wavelength in the visible light spectrum because the less energy a wave carries the longer the wavelength and red carries the least energy of all the colors in the visible spectrum
Green
Photons with higher energy correspond to electromagnetic radiation with higher frequency/shorter wavelength. In the visible band, the color with the highest frequency is the last one you can see on the VIOLET end of the spectrum.
I suspect you mean the color with respect to light. If this is the case then red light has the lowest energy of the visible spectrum. Of course visible light is just a small part of the electromagnetic spectrum, for example, infrared light has even less energy. The lowest energy would be found in radio waves. Also it is important to realize that color is just a convention, it has no real physical meaning. Some other animal might see totally different colors.
The brightness has nothing to do with it. Colors closer to the violet end have more energy.