Integrated circuits, or ICs, are not always black in color. They can also be green, blue, or other colors. The color of an IC is determined by the material used to make the substrate, or the base material, on which the circuit is built. The color of an IC is determined by the material used to make the substrate, or the base material, on which the circuit is built.

The most common substrate material is silicon, which is typically black or dark in color. This is because the silicon substrate is typically treated with a process called "doping," which adds impurities to the substrate to create the semiconducting properties needed for the substrate. process called "doping," which adds impurities to the substrate to create the semiconducting properties needed for the circuit to function. This is because the silicon substrate is typically treated with a process called "doping," which adds impurities to the substrate to create the semiconducting properties needed for the circuit to function.