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QR codes also will always work in grayscale.
by stefanpie 8y ago
QR codes also will always work in grayscale.
- LoSboccacc 8y agothey also work in two tone colors, so they don't ruin a billboard/leaflet aesthetic (even if there are a lot of reader out there that get confused by a white pattern on dark background code, even if the spec allows it)