Mobile Brand Header button background colour not right?

Development
,
4

This is caused by some custom CSS you have in your theme. You have this in your light theme in the common section.

header.b-header {
  background-color: #378899;
}

The common stylesheet applies to both desktop and mobile. Either move that rule to the desktop section or change it to look like this.

.desktop-view header.b-header {
  background-color: #378899;
}