How to realize Unity Editor Scene Filter View Effect in my game.

Hi, I am designing a building management system using Unity. I found the effect of Scene Filter in Unity Editor is very cool. The object I am interested in will filtered out with colorful effect while others will get grey. I want to know how this effect is realized. I know one way is to do something by changing the materials of all my objects, but it is very complex. I have tried to change objects mesh colors[], but failed. So can anybody tell me there is a simpler way to get that objects filtering effect? Thank you very much.