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 i think we're removing the inverted QR codes altogether. there seem to be quite some readers out there which do not support them.  

thanks for bringing this up! 🙌 
 yeah, big codes are a problem too but there's no way around that for a payment path, has to be around 2x2, but many readers don't like inverted and they need that outline area to catch the square properly 
 yeah, better not compromise on functionality in this case imo. a working QR code is always better than a "beautiful" QR code.  
 well, you can do pretty things to it but the light outline, and the dark on light has to be the same, but you can replace the square pixels with little circles or whatever so long as they are a reasonable size, and due to the optional level of error correction you can wipe out even (any? or at least the centre) 1/9th of the code on higher levels of error correction and put an icon in there

but i don't think this is really needed for a web interface for a management system, this kind of vanity QR is more of a mobile client thing to wow your nocoiner friends with