Big bug in all materials

I have a problem with all materials, there’s some strange purple color arround.
I take a picture of it: Please I want to fix this.

PD: Yes it’s red too and yes it’s windows 10

I noticed that but it doesnt seem a bug to me, as when I run my project this isnt shown. It looks more like a highlight mark. Choose another gameobject in your project and you’ll see that mark is transfered to it. Check your Game view or run your project in unity and you’ll see that it not appears.