- when the position of the sun is low rise, or sink, we looked through the most thick atmosphere. When have to hitch that thickness, most of the blue light that come to our direction mixed to every directions, so that light to our eyes doesn't have blue element. The lack of blue element at sun light appear to be red, orange, or yellow, depending on the size of the particles of dust that hang in the air, as well as colors that mixed by dust particles.