Blue, Red and pink Materia

Hi guys i just started using unity recently but today after working on some animation blending, most (not all) prefabs changed to look like this:
107002-capture.png
What’s the cause, and how can i fix it?

Also asked the same question here

Have you already checked in the inspector if the material references have been lost? You might just need to drag the materials back onto the object or back into the inspector.