See item description:
The QL-820NWB is the first direct thermal printer to deliver 2-colour labels in red and black.
=> Images work in principle, but only in red/black/white :) And red only works if you use labels that support it. (I tested it once, but have now stuck to black/white as a rule, as I hardly ever need red).
Example see:
https://officedepot.scene7.com/is...