Rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Half circle grassland prairie meadow wold pasture steppe plateau tableland lowland plain treeless clear bright illuminated full navy blue curved curve colored colorful coloured colourful hued paint dye staining incredibly gorgeous majestic beauty perfection wonderful fantastic excellent amazing beautiful real dark dense double dual two spectacular best natural event sunlight continental climate weather air meteorology background lithochromatic red yellow green orange purple pink turquoise. UHD 4K 3840X2160.