Jorge Ok I figured out why…. I have an extension installed in chrome that handles inversion of colors for web sites that don’t (I really hate black text on white bakcground) . Ít’s called high Contrast. I had set it for Normal for the Legend web site so as not to interfere, but apparently that wasn’t enough. I had to disable it and then the night mode does change everything.
Interestingl the way the Legen web site handles the css styles makes the extension ineffective as I cannot alter the colors of the web site through the extension.