What colors can it be?

Rock Salt doesn't really come in many different natural colors; however, that doesn't mean it has only one color. Pure Rock Salt is naturally colorless, but in nature it is often not pure so it is discolor edgy the environment. This type of Rock Salt can be blue, light red, and some even have a hint of yellow. This is all natural color though. Many times, Rock Salt is dyed to be any color that we please.