title: Change the background color of a plot
body: <p>I am using Plotly.js for plots on <a href="http://www.whereisroadster.com" rel="noreferrer">my website</a>. I can't for the life of me figure out how to change the background color to anything besides white. Can that be done, or am I just missing something? Space isn't white, it is black, it would be nice to see it as such...</p>
  
  <p><a href="https://i.stack.imgur.com/XDmxe.png" rel="noreferrer"><img src="https://i.stack.imgur.com/XDmxe.png" alt="enter image description here"></a></p>