Layout color of the background of the sub-pages

I would like to know how can I change the purple background into grey of the subpages.Thank you much

Hello there,

I hope you are doing well today.

You can use the following CSS code to change the color in the dropdown by going to Appearance > Customize > Additional CSS and pasting it there.

/*Dropdown  color*/
.dropdown-menu> li> a:hover {
    background-color: red;

Best Regards,