is cyan ok to use as a barcode colour on packaging, if so do you have proof?

is cyan ok to use as a barcode colour on packaging, if so do you have proof?

Best answer:

Both 2D and 3D bar codes rely on contrast, not neccesarily color. If you print the bc on a similar color, the camera will not recognize it and you will get a read failure. Putting a cyan bc on a contrasting color or white would be fine.