The Mylio Photos Histogram tool includes a feature that will show clipping on your images.
Highlight clipping is when detail is lost in the brightest areas of a photo. Shadow Clipping is when detail is lost in the darkest areas of a photo. The clipping warning, when activated, will overlay clipped highlight areas in red and clipped shadow areas in blue.
The easiest way to turn off this feature is with the keyboard short which is the letter <j>. You can also go to the Edit Panel and click the corresponding black or white dots in the Histogram.
More detailed instruction can be found in the Mylio Photos Manual here: https://manual.mylio.com/en/topic/using-the-histogram