Mold Color alone is not an indication of a Mycotoxin producing species of mold. Toxic and non-toxic mold can be found in all colors of the rainbow. They can both be found in colors ranging from: white, blue, purple, green, black, etc. in color. The most famous of toxic molds is Stachybotrys, this is the mold species most often referred to as Toxic Black Mold, and this mold can even be very dark green in color.