title: R shinydashboard custom CSS to valueBox
body: <p>I have been trying to change the color of the valueBox to a custom color (beyond those available in validColors) but have been unable to do so. I understand there is a way of using tags to include custom CSS however I haven't been able to put them in the right place.</p>
  
  <pre><code>ui&lt;- dashboardPage(   
                  dashboardHeader(),  
                   dashboardSidebar(),  
                   dashboardBody(  
                             fluidRow(valueBoxOutput("name")  
                               )))
  
   server&lt;- function(input, output){  
    output$name&lt;- renderValueBox({ valueBox(  
      ("example"), subtitle = "Subtitle text",color="blue")}  
    )}
  </code></pre>
  
  <p>Any help much appreciated!</p>