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 Any distinct bands perceived are an artefact of human colour vision, and no banding of any type is seen in a black-and-white photo of a rainbow, only a smooth gradation of intensity to a maximum, then fading towards the other side. For colours seen by the human eye, the most commonly cited and remembered sequence is Newton's sevenfold red, orange, yellow, green, blue, indigo and violet, remembered by the mnemonic "Richard Of York Gave Battle In Vain" (ROYGBIV). Rainbows can be caused by many forms of airborne water. These include not only rain, but also mist, spray, and airborne dew.