In case you didn't know, the COG Forum has multiple color themes available, including a Dark Mode.
To find and try them out you can:
1) Go to the bottom left of any forum page and click the link that says either "Default style" or "Style chooser". Then select one of the styles/themes offered in the popup.
or
2) Click on your forum name in the top right corner of any forum page. Click Preferences (in the lower left). In "Your Account" (select on the left column if needed) click on the "Style" dropdown list (it's the top item) and select a style/theme from the list.
or
3) got to Profile > Your Account > Style
Note: the Styles/Themes only apply to the COG Forum pages, they do not apply to website pages.
To find and try them out you can:
1) Go to the bottom left of any forum page and click the link that says either "Default style" or "Style chooser". Then select one of the styles/themes offered in the popup.
or
2) Click on your forum name in the top right corner of any forum page. Click Preferences (in the lower left). In "Your Account" (select on the left column if needed) click on the "Style" dropdown list (it's the top item) and select a style/theme from the list.
or
3) got to Profile > Your Account > Style
Note: the Styles/Themes only apply to the COG Forum pages, they do not apply to website pages.