PHPStorm配置：如何删除嵌入式html的背景颜色？

I find this "code highlighting" very annoying. Can someone show me how to disable it on PHPStrom, and perhaps explain why this happens?

Here's an image of my Js/Jquery code on PHPStorm IDE: enter image description here

In the WebStorm preferences go to Editor » Color & Fonts » General choose Injected language fragment from the list and turn off Background chackbox.

It's hard to answer _why it happens) - it's just a preference. Maybe someone prefers to see injected code (the code in language other than the main one used in given file) clearly marked. For me, it's also a distraction, I have just turned it off inspired by your question ;)

That's Language Injection in action.

You cannot disable it -- ATM language injections in JavaScript cannot be disabled.

But you can remove/change background color at Settings (Preferences on Mac) | Editor | Colors & Fonts | General.