Purple solder masks are typically used for submarine PCBs. Purple is the perfect color choice for achieving a good contrast between the planes and traces on the surface. Yellow solder masks have the PCB color code #F6A624. If you have certain routes to highlight, consider using a dark yellow solder board to capture attention. Yellow PCBs are easy to clean when it comes to light-colored residues. The assembler can address the silkscreen issue through black silk printing, even though it might not bring the desired result. Yellow achieves the same contrast between planes, no-copper areas, and traces as green, but its silkscreen doesn’t offer a high contrast with the board. You can distinguish black PCBs using the color code #000000. The black solder masks are available in matte and gloss finishes, with the former having a slightly better contrast. The assembler who opts to use black must place a temperature sensor on the board. That said, black solder masks can cause an increase in heat, which can discolor the silkscreen (turning it into light brown during the reflow process). ![]() When black is put on the background, the eyes aren’t distracted by the screen’s details. Black also looks great on LCD back panels. Blackīlack solder masks offer more visibility than the white ones, and while the contrast is minimal, they make it easier to see large components and labeling. As such, white solder masks are only used on a selective basis. Cleaning them, too, requires a lot of effort as you need to remove the stains to make the panel look neat. However, they have the lowest contrast of all PCBs on a general level – they’re hard to display correctly even under lighting. They can also make any artwork on the silkscreen layer stand out with high contrast of black printing. With the PCB color code #ECECDF, white solder masks are typically used for LCB applications. Blue solder masks have the PCB color code #4990E2. So if you’re going to use blue, you may need to use magnification to identify manufacturing-related defects. However, blue’s contrast is shallow compared to green and red solder masks on a standard circuit board. It is even suitable for mounting on liquid crystal displays (LCDs) as it doesn’t produce bright background colors or sharp contrasting edges. The color also enhances the PCB’s aesthetic appeal. Assemblers of these boards use blue against the silkscreen to achieve high contrast. BlueĪrduino boards contain blue solder masks. Red solder masks have the PCB color code #D0011B. What’s more, red also makes the silkscreen stand out well and allows for easy cleaning of flux residues. ![]() If the board is visible from the outside of a finished product, the red solder mask will bring a sense of freshness compared to stale industry colors. Red also makes the PCB look bold and compelling. Red solder masks are becoming popular due to the contrast and visibility they offer for traces, planes, and no-copper areas. It’s available in different varieties, including matte and glossy variants. ![]() Green finishing also reflects less light and offers the right contrast with the white silkscreen. Green solder masks have the PCB color code #008C4A. This particular color is easy on the eyes and delivers high contrast between planes, traces, and the empty space on the board. Green is the most popular solder mask color for PCBs. The following are the different solder mask colors you can choose: Green Designers and assemblers use different colors to give a highly visible indicator of revisions and help prevent slip-ups in a mixed assembly project. Solder mask colors do not have any effect or impact on a PCB’s performance. Does the Type of Solder Mask Finish Affect PCB Performance?ĭifferent PCB/Solder Mask Colors and When to Use Each.Different PCB/Solder Mask Colors and When to Use Each.
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