Why contrast is critical
Smartphones use light sensors to recognize modules. If the foreground and background colors are too similar, the camera cannot identify the finder squares, resulting in complete scan failures.
Safe color combinations
Deep charcoal dots on a clean white page, rich royal blue dots on cream cards, or a dark emerald-to-violet gradient on light gray paper all scan perfectly.
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Written by Alex Rivera
Technical Director & Product Designer
Alex Rivera is a software engineer and digital designer specializing in mobile identity, QR technology, and contactless workflows. He has spent over a decade building high-performance web applications and native tools.
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