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 as "blue" would today be regarded as cyan, and what Newton called "indigo" would today be considered blue. The colour pattern of a rainbow is different from a spectrum, and the colours are less saturated. There is spectral smearing in a rainbow owing to the fact that for any particular wavelength, there is a distribution of exit angles, rather than a single unvarying angle. In addition, a rainbow is a blurred version of the bow obtained from a point source, because the disk diameter of the sun (0.5°) cannot be neglected compared to the width of a rainbow (2°). The