How to remove red border in phpStorm?

I have a little strange question, and I'm hoping you could help. Cause, I've been searching for the answer in Google, in PHPstorm documentation and etc.

Here's what I need. Every time I type something in CSS or HTML with Zen coding, this Red Border appears to the value. When my mouse cursor is anywhere else and I hit "Enter", the cursor goes to the end of that red border.

So does anybody know, how to get rid of it? It drives me crazy.. Thanks.