Endurant EMCBROWN5GAL Mulch Colorant Brown 5 Gallon. ENDURANT Mulch Colorant is a liquid pigment, available in four blendable colors, which instantly and inexpensively enhances a landscape's appearance, refreshing existing faded installations with an unlimited range of shades. Endurant Mulch Colorant Brown is a very popular color. It creates contrast and yet coordinates well with all the shades of green in most landscapes. Endurant is nontoxic and environmentally responsible, saving trees by avoiding piling on extra mulch when unnecessary.