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Provide guidelines for colour usage in barcode printing, including the best colours, usage of warm and cool colours, and the need to test colour combinations on multiple scanners.
Explain why metallic inks should NOT be used for barcode printing.
See also online: Barcode Colour Guide (PDF).
- The best colour for barcode printing is black bars on a white background.
- Bars must always be darker than the spaces, with high contrast.
- Cold colours such as green, blue, violet, and black make a good choice for bars, as they appear black under red scanning light.
- Warm colours such as yellow, red, orange and white are not seen by the scanner and are therefore good for background colours.
- If you’re using a colour combination, we recommend that you test your printed barcode label with a few different barcode scanners to make sure that it is easily readable (scanner products can have slightly different colour calibrations).
IMPORTANT: Metallic surfaces and inks should not be used for barcode printing as they reflect light away from the scanner, making scanning extremely difficult.
Acceptable colour combinations:
Unacceptable colour combinations: