How do i reset to the defualt Camera setting(Unity3d)

You know when you first set up Unity it has that scene where a Area Light is acting kind of like a sun and the camera is a nice shade that allows you to clearly see around you?. I accidently changed my settings on my Main Camera and it has stayed there as a default like a solid color of blue.How do I get the original camera settings back?

Feedback is appreciated in advanced ;)

Edit plz help this is really annoying

Note:
I set it to default as something else. I can open any of my Games or even make a new one and its still there