As a visual artist, one of my desires is to develop a vision till the supernatural, i.e. to increase the perception potential of a wider range of color waves. The most abundant amount of soft above violet rays of light in the natural environment was observed during rare sunsets in lilac - ultraviolet tones. I've been watching this phenomenon for the past few years. If you look at the setting sun while sitting next to someone, your neighbor will not see exactly the same thing as you. The color of the beam depends on how the eye perceives the wavelength. And each person in this sense is a little bit unique. Not finding enough information and a name of a sunset in these colors, the name of such a phenomenon was defined ephemeral.