Why is my virtual keyboard like this?

[sneak3]

Hello all.

I'm on a rMBP 15, latest macos sierra and I wonder why my virtual keyboard is like this:

What are those 2 keys orange?

 

[saintsfan1970]

The one on the right is an apostrophe, the one on the left would be better understood if you go to the link below.

https://www.computerhope.com/keys.htm

 

[sneak3]

Yes but why is it orange?

 

[saintsfan1970]

I don't know...I thought you highlighted them because you asked "What are those 2 keys orange?"

 

[imhereareyou]

The orange represent accent characters to add to the next inputed letter. hold down the key, other things will show