title: How to draw a line with color in shiny application
body: <p>This may be a simplest thing for lot of people, but I'm struggling with it. 
  I'd like to draw a line with color using html tag "hr"
  This is what I have tried so far in ui.R file : </p>
  
  <pre><code>HTML("&lt;hr color='purple' &gt;")
  HTML('&lt;hr color="purple" &gt;')
  hr( color="purple" )
  </code></pre>
  
  <p>None of them worked - any suggestions please?</p>