So, you have a dark logo and the night mode extension. You go into night mode, and you can't see your logo anymore. What do you do? Change the color of your logo? No! Add the css filter rule.
img.Header-logo {
-webkit-filter: brightness(250%);
filter: brightness(250%);
}
This will make your dark logo bright enough to show up in night mode. At least in new, modern browsers.
You're welcome.