Green solder mask
Green is the most common color used as a solder mask in printed circuit boards. Such boards are usually bod green and have a white silkscreen.
Green is the best color for the printed circuit board design and is well-suited.
The white silkscreen is also in good contrast with the green color.
Red solder mask
The red color is also becoming famous for PCB design because it looks attractive, and the contrast between the transistors and components gives it a better look.
The silkscreen also stands at best on the board in a red background, and the flux residues are cleaning up amazingly well.
Solder Mask Color–Blue solder mask
The dark blue color is being used in numerous professional printed circuit boards, gaining immense demand. The contrast between the planes, trances, and empty spaces is fantastic.
The best thing about having the blue color printed circuit board is its contrast between the silkscreen and solder mask if there is heavy labeling in the printed circuit board.
Other Colors
Black, white, and yellow are a few other colors used as solder mask colors, but they are not that popular. Selective companies are using these colors for commercial purposes.
The contrast among the traces, silkscreen, and solder mask is good, and the components also look attractive in these colors.