current-menu-item class in CSS

If you want to use different styling for active menu items on a single page website or automatically select correct menu items you should use a jQuery plugin like this one.

How to add styles set by user in the customizer

I haven’t clarified what is the best method to apply styles from the customizer. However, this is the function i am using right now (Not using the previous one anymore, therefore, you can remove the wp_add_inline_style part): // I like this way so much more that i’m going to cry. // Thanks to: // https://code.tutsplus.com/tutorials/settings-and-controls-for-a-color-scheme-in-the-theme-customizer–cms-21350 … Read more