I am very new to using Opera. What I hope is that this is the correct place to urge the developer to create a "Dark Reader" for Opera. I'm rapidly approaching the age where I'm considered an antique. Essentially I have significant vision issues, and the glare from a white screen makes almost anything much more difficult to read.
My main complaint with Dark Reader is that while it does a great job of switching black for white, and white for black, it does not do a very good job dealing with colors. In my opinion they don't need to switch so much as they might benefit from increased intensity to better contrast on a black background.
The other issue, might enable a faster extension -- something to at least make the text convert from GRAY to BLACK. I would be able to read the screen better with true black instead of Opera's default washed down black aka gray. color for most test displays.
Thank you for your consideration of these comments.