An apparatus and method for removing debris suspended in a main fluid flow using a fluid strainer that uses an integrated nozzlediffuser for discharging debris that is dislodged from an internal porous surface. The system includes a first, second, and third wavelength selective switch. A customized color can be selected from a smaller gamut of darker color by a customer and a sufficient difference in a black toner between the two color mixtures can be maintained to provide sufficient contrast for the infrared detection.