Decided to update the QR Code generator as the marketplace version didn't work. Will be doing some more changes to add in logo and colors to this one shortly.
You can currently modify the colors by directly inputting them in 00XXXXXXXX format. have marked them in the code.
Widget code available at:https://dahobi.flutterflow.app/blogPostDetail?postID=sztw8VldkMafFPq0oxHC&hobbyDoc=ecZosNMPtoWGCbWUJKCc&moduleDoc=o4HsWGsqj5lDev2hbg1p
Do test it out and let me know how it pans out on your end. Enjoy using the widget in your project.