Rainbow rose for this colouring process are "Rosa" La Belle and "Rosa" Avalanche+. However, these cultivars' rainbows are not as bright as "Vendela". Some vendors use the cultivar name to describe their products, "e.g.", Vendela Rainbow Rose, or Rose Avalanche Crystal Green. The Original Rainbow Rose has the seven colours of the rainbow and is the most popular rose in this category. However, there are also the tropical variant with combinations of red/pink and yellow, and the ocean variant with combinations of green and blue. Other colour combinations are also possible, though black and white are impossible to make. Rainbow rose The
Rainbow by any water droplets viewed from a certain angle relative to a light source. Thus, a rainbow is not an object and cannot be physically approached. Indeed, it is impossible for an observer to see a rainbow from water droplets at any angle other than the customary one of 42 degrees from the direction opposite the light source. Even if an observer sees another observer who seems "under" or "at the end of" a rainbow, the second observer will see a different rainbow—farther off—at the same angle as seen by the first observer. Rainbows span a continuous spectrum of colours.