Skin (Dark Colour Of The). Darkness of complexion has been attributed to the sun's power, from the age of Solomon to this day, - " Look not upon me, because I am black, because the sun hath looked upon me;" and there cannot be a doubt that, to a certain degree, the opinion is well founded. The invisible rays in the solar beams, which change vegetable colour, and have been employed with such remarkable effect in the Daguerreotype, act upon every substance upon which they fall, producing mysterious and wonderful changes in their molecular state, man not excepted.