tablet menu background color still white

WordPress 6.1.1
Elementor and also OceanWP newest variation

I included

 header-menu-sidebar-inner {
history: blue! crucial;

To take care of the history food selection shade for cellphones. I establish the history shade of food selections to blue in Header Mobile Food Selection. The shade under of wordpress for tablet computer and also mobile customer is blue. My tablet computer still have a white food selection. Is this an insect? What is the job about.