The Seven Rainbow Crystals in Sailor Moon.The second opening of the anime is even called "Rainbow Notes". This forms the motif of the seven princesses in Mermaid Melody Pichi Pichi Pitch, with pink, aqua, and deep blue subbing in for red, blue, and indigo, respectively.Unlike most cases, indigo is shunted for yellow-green. In Seven of Seven, the main character is split into seven of herself, and each girl has a corresponding color.The name also doubles as the Italian word for rainbow. Each member of the Arcobaleno has a corresponding color, fitting to their Dying Will Flames.
The (orange) Sky Flame is always the leader's flame. Red is storm, orange is sky, yellow is sun, green is lightning, blue is rain, indigo is mist, and violet is cloud. Each is named after an aspect of weather. For printing inks and finer art, cyan, magenta note magenta is an odd color, since it is a combination of red and blue which are on opposite ends of the spectrum of visible light due to the way the photoreceptors in your eye work, there's no pure spectral color that looks like magenta, so it doesn't appear in the rainbow, and yellow are the primary colors, making orange yet another odd color out along the same lines as indigo note as both are neither primaries nor secondaries and making cyan's absence even more conspicuous (unless one considers NewtonÂ’s model, where cyan/blue takes the place of blue/indigo) Curiously, cyan is missing, creating a conspicuous gap between the primaries green and blue. Alternatively, some creators opt to branch out into the non-visible parts of the electromagnetic spectrum, such as infrared and ultraviolet. If the creator needs a few more colors to round out the cast, black and white are common additions. note There is evidence to suggest that Isaac Newton in fact considered the rainbow colours to be Red, Orange, Yellow, Green, Cyan, Blue, Violet. note Around Newton's time, indigo was named after an expensive yet fast-fading blue dye imported from India, and it was used for paints and textiles, most notably in denim, before the dye was replaced by the synthetic and permanent Prussian blue in the 18th century and the more permanent Phthalocyanine blue in the 20th century. Indigo is generally considered the odd man out among the seven, due to it simply being a dark blue.