title: Change color in Shiny Dashboard for menuSubItem
body: <p>I have a problem with the colors for menu subItems.<br>
  The color spreads first over all the subitems (picture 1), the font color is grey.<br>
  And when I hover the top-menu-item is black (picture 2).</p>
  
  <p>What works so far is changing the background color of the submenu:</p>
  
  <pre><code>.skin-red .main-sidebar .sidebar .sidebar-menu .treeview-menu {
      background-color: #FDFDFD;
  }
  </code></pre>
  
  <p>I tried variations of:</p>
  
  <pre><code>.skin-red .main-sidebar .sidebar .sidebar-menu .treeview-menu a {
      color: #8e44ad;
  }   
  
  .skin-red .main-sidebar .sidebar .sidebar-menu .treeview-menu a:hover {
      color: #8e44ad;
  }   
  </code></pre>
  
  <p>With submenu selected:</p>
  
  <p><a href="https://i.stack.imgur.com/4VK95.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4VK95.png" alt="Submenu selected"></a></p>
  
  <p>With submenu selected and hovered in this area:</p>
  
  <p><a href="https://i.stack.imgur.com/RYrTc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RYrTc.png" alt="Submenu selected and hovered in this area"></a></p>
  
  <p>Thanks for your help!</p>