Menu transparent with dark text but when I scroll the page I want light text

Hello,

For the sticky header Please try adding the following Custom CSS in the Global Custom CSS area under Theme Settings >> Custom CSS.

/*sticky background*/

body .whb-sticked .whb-general-header {
	background-color: white;
}

/*sticky main menu color*/

body .whb-sticked .woodmart-navigation .item-level-0.current-menu-item>a{
color:yellow;
}
body  .whb-sticked  .woodmart-navigation .item-level-0>a{
color:yellow;
}

/*sticky main menu color hover*/

body  .whb-sticked  .woodmart-navigation .item-level-0>a:hover{
color:yellow;
}

If you are trying to ask anything else then provide a relevant screenshot of the specific area with the URL of the website to check it myself and help you out accordingly.

Regard’s.
Xtemos Studios.