Why has my asus phone photos and background turned negative?

[AC Question]

I took some photos which were all okay and normal but for some reason the photos turned negative and the display and background also changed which I could not explain. when I use the camera the photos are now all negative. when I first purchased the phone everything was okay until a few days ago but now something is wrong

 

[Javier P]

Hi, welcome to the forums! Check your accessibility settings and make sure that color inversion is disabled.