The HTTP links in a post are a light-ish grey when not highlighted and become a subtle darker grey when they are highlighted.
The NavBar links at the top of the page turn a nice silver with the text turning from white to black when highlighted.
And the links below the NavBar just get a nice subtle light grey box around them when highlighted.
Just a heads up on the Dark theme Boss - the Bold, Italic and Underline aren't clearly visible in the Quick Reply window.
I've attached a screeny showing the Quick Reply window when Bold, Italic and Underline aren't highlighted and when they are to show you what I mean...