The red and green regions you are seeing are exposure warnings. The red regions are areas of the picture that are over-exposed. The green regions are areas of the picture that are under-exposed. These colours are not permanently on your pictures. You may want to deactivate the auto-exposure warnings as follows:
View mode:- Click the View menu.
- You should see a checkmark next to Exposure Warning. To deactivate the exposure warning, simply click Exposure Warning to uncheck.
Develop and Edit mode
- Click the Exposure Warning icon to turn the warning on and off. It is the first icon on the toolbar, an exclamation mark.