PCB solder mask can be displayed in different colors, including green, white, blue, black, red, yellow, matte, purple, chrysanthemum, bright green, matte black, matte green and so on. Under normal circumstances, white is the production of LED lighting these products must be used in white PCB circuit boards, the other colors are mostly because of the product grading system, each company is different, some use red to indicate experimental boards, some use blue to indicate the focus of the board, and some use black to indicate the boards used for computer internals.
So why are most PCBs green? The reason is not complicated. Most of the PCB on the green, in fact, is the colour of the solder resist green oil, green is the most versatile, because the green process is the most mature, the most simple, and its manufacturing cost is more cost-effective, in addition to the green outside the bright green, light green, matte green, and so on.
