badge color of envelope is now black

My PC just was updated to the latest version of WIndows 10 and a number of colors on my desktop changed.  I have modified these back to pretty much where they wre prior to the update.  Of most annoyance is that the badge color of the envelope that appears over the emclient  icon in the taskbar is now black (rather than white) making it almost impossible to see.  Does anyone have any insight as to who I might be able to get this envelope badge to be white again?