To get back to original desktop color > Got to PC Settings - click "Personalization". In the first window you'll see "Sync your settings", click that, this may help bring you back to original color mode.
Due to some eyesight problems I tried to improve the display and colour on my monitor by changing various settings. I have made matters worse and seem unable to restore my settings. Can I somewhow or other restore the original display,text,  contrast and colour settings to the original factory settings. My knowledge of these things is fairly basic. HMyers
Restoring Windows 10 Diplay, Contrast & Colour settings