Based on the example you posted a link to you can try:
ui.R
dashboardPage(
dashboardHeader(
title = "Example of a long title that needs more space",
titleWidth = 450
),
dashboardSidebar( sidebarMenu(
menuItem("Dashboard", tabName = "dashboard", icon = icon("dashboard")),
menuItem("Widgets", icon = icon("th"), tabName = "widgets",
badgeLabel = "new", badgeColor = "green")
)),
dashboardBody(
# Also add some custom CSS to make the title background area the same
# color as the rest of the header.
tags$head(tags$style(HTML('
/* logo */
.skin-blue .main-header .logo {
background-color: #f4b943;
}
/* logo when hovered */
.skin-blue .main-header .logo:hover {
background-color: #f4b943;
}
/* navbar (rest of the header) */
.skin-blue .main-header .navbar {
background-color: #f4b943;
}
/* main sidebar */
.skin-blue .main-sidebar {
background-color: #f4b943;
}
/* active selected tab in the sidebarmenu */
.skin-blue .main-sidebar .sidebar .sidebar-menu .active a{
background-color: #ff0000;
}
/* other links in the sidebarmenu */
.skin-blue .main-sidebar .sidebar .sidebar-menu a{
background-color: #00ff00;
color: #000000;
}
/* other links in the sidebarmenu when hovered */
.skin-blue .main-sidebar .sidebar .sidebar-menu a:hover{
background-color: #ff69b4;
}
/* toggle button when hovered */
.skin-blue .main-header .navbar .sidebar-toggle:hover{
background-color: #ff69b4;
}
')))
)
)
I commented the CSS to point out what it modifies.
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