This is the fluorescent colors from Montana Black, which is a series of spray cans with high and low pressure in the same can with the help of level-cap system. The cans comes with a fatcap as originalcap and also works perfect in our northern climate in the winter. The remaining 164 colors from The Montana Black Scale can be found here - Montana Black.
About fluorescent colors.
Special type of paint color that absorbs light, is perceived very strong and can appear self-illuminating. Also responds to ultra violet light and illuminates. Perfect at night clubs or in similar environments.
They generally covers poorer than "normal" colors, so a light base is preferable, but they appear very special and nice.
Fluorescent color is also not lightfast, and they fade over time.