Author 'Boucher Marc dit de Meilh' (Id 188704 ) : Arc-en-ciel, other framing giving more space to the sky as the background. The colors of this phenomenon and atmospheric weather have inspired many artists and scholars who have drawn important conclusions in regard to the painting, the pictorial art. In sum, the laws of painting are based on the colors of the rainbow, the circle simultaneously, etc, They have determined that the palette of the painter was to be made up according to the colors of the rainbow starting from violet blue green yellow orange and red. In reflective we get the primary colors : red, blue, yellow which give the complementary violet (red-blue), green (blue-yellow), orange (yellow-red) there are in the sky, all of a sudden, painters playing with sacred colors ; the proof of this !... Ph : Marc de Meilhan Butcher.