The previous dark theme was perfect. Not sure what kind of usability testing went into this new dark theme, but there is not near enough distinction between the active and non-active tabs. I find myself frequently clicking on the WRONG tabs, because the important visual cues are now virtually non-existent. Yes, there is a very subtle, barely perceptible difference in the shade. Consider that this likely varies from monitor to monitor, is insufficient to distinguish, and leads to constant confusion due to proper lack of visual cues - a significant step back for Opera, compared to the previous dark theme.
I am a long time Opera power user and fan, way back since version 3. The introduction of this issue related to the dark theme compelled me to sign up for this first post since the old days. As a UI and Web Developer for 25 yrs, I think it's that important, and is making me reconsider moving to another browser for the first time since Opera 3.
Please fix this theme. It fails this basic and essential usability test.
Hopefully someone from the Developer Team sees this post. I notice that I am not the only one confused and frustrated by this UI faux pas.
Thanks for you attention.