how to change the style of this menu?!

[Gelloiss]

How to get rid of this blue background of the highlighted menu item? I tried to take all the css selectors from your documentation, by the way, there is an error in them, in the doc .contexify__item, but in fact .contexify_item. I tried to specify Item className, it works, but for hover or focus there is still a blue background, it is not replaced in any way!!!