In VS2015 I have the Color Theme Editor extension installed and I\'m using the Dark with Light Editor theme.
The hover tooltips are mostly unreadable as the tooltip
This is a fix for users using Windows High Contrast Theme.
In such case there is no way to change tooltip background color in Visual Studio options window and neither in Theme Color Editor extension.
So to fix it:
Result (Visual Studio 2015 and Windows High Contrast theme):
A