Title Bar Text Gets Highlighted

I don't know how or why this annoying problem started but every title bar of Apps which I am using gets highlighted, like this:



I don't remember to have put any customization on top of vanilla Windows 10. The problem is better described by this:



As soon as I click out of focus, the text has this strange highlight effect! What am I doing wrong? How to fix this?
Thanks.

Welcome to Ten Forums.

Just to rule this out. Right on desktop in clear area, click on personalize, Settings open, click on colour (left side of screen), at the bottom of right side see High Contrast setting, click, at the top "Choose a Theme" set to None.

Caledon Ken said:

Welcome to Ten Forums.

Just to rule this out. Right on desktop in clear area, click on personalize, Settings open, click on colour (left side of screen), at the bottom of right side see High Contrast setting, click, at the top "Choose a Theme" set to None.

Wow! Trick done!

Great. Would be interesting to see how this got set in first place. Maybe it is just Gremlins at play.

Caledon Ken said:

Great. Would be interesting to see how this got set in first place. Maybe it is just Gremlins at play.

Elves! It's Christmas time!