title: dygraphs change background colour
body: <p>how to change the background colour when using the dygraphs in R.</p>
  
  <p>I am looking in the CSS options (<a href="https://rstudio.github.io/dygraphs/gallery-css-styling.html" rel="nofollow">https://rstudio.github.io/dygraphs/gallery-css-styling.html</a>) hoping to change the background but can't find anything.</p>
  
  <p>The graph will eventually end up in a shiny dashboard, would I need to change the CSS there instead?</p>
  
  <p>I am hoping to change the background to black.</p>
  
  <p>A reproducible example would be the one provided in the link.</p>
  
  <p>Any suggestions would be greatly appreciated.</p>
  
  <p>Thanks.</p>