Why my lg g3 fonts are now white with black outline?

[AC Question]

Hello,
I noticed that my lg g3 fonts are now white with black outline. It looks very weird and its really annoying.
I don't know if it has anything to do with that, but it happened after I downloaded CM Security Antivirus AppLock.
Any suggestions about how I can bring it back to normal?

 

[belodion]

Try Safe Mode, to test whether a third-party app is causing the problem. If the problem stops, you'll have to identify and uninstall the app.

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