Particular QR code generators provide the option to select a background shade to the outer margin, that's a identifying factor when choosing on different colors. It can be really worth noting that with the QR code to become entirely readable, it needs to be printed at a bare minimum width https://generator-qr-code-wifi02222.suomiblog.com/getting-my-generator-qr-code-db-legends-to-work-45774521