Originally posted by sgunhouse:
In Opera for Linux there is an extra section in opera:config which only has an effect in X11 mode.
Thanks a lot sgunhouse for your very pertinent answer. I did not find how to drop to X11 mode (with the exception of the file chooser in X11 mode) so my Opera is still in GTK mode. However your suggestion allowed me to find an "Interface colors" section in opera:config and I was then pretty confident it would solve my problem. I changed all the gray colors into bright colors and restarted to test... Then it was Carnival but... the status bar was still gray on gray!
Despite this, my problem is now SOLVED. Since I always had the status bar active, I hadn’t noticed that, when it is disabled, there is a nice tooltip with the address popping up in black on white. Actually I barely needed the status bar for anything else, since Opera allows us to zoom in and out through the keyboard, which is way more efficient than the slider in the status bar.
Thanks again to all who replied! Your help was very much appreciated and I learned things.