On settings.json, set the following to have this :

{
    "workbench.colorCustomizations": {
        "[One Dark Pro]": {   // your theme name
            "editorHoverWidget.foreground":"#ffff00",  
            "textLink.foreground": "#00ffff",  
            "editorHoverWidget.statusBarBackground":"#008800"   // as a bonus
        }
    }
}