browser - Invert web page colours in Opera - Super User

I want to have inverted colours in Opera (including pictures) for browsing web content. How can I achieve that? I found in How to invert web pages colour scheme in Firefox? another that one shoul

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How to fix random inverted colours in opera gx : r/OperaGX

Opera GX : Some elements' colors are inverted : r/operabrowser

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Opera GX : Some elements' colors are inverted : r/operabrowser