title: Specify numeric value for named colour in CSS
body: <p>I'm thinking this is impossible but on the off chance I missed something, is it possible to override the value of named colours?</p>
  
  <p>In other words I have an html page with style="background-color:red;" in it, would it be possible to specify that it use #FA5858 instead of the default #FF0000?</p>
  
  <p>I don't wish to edit the HTML file as it is generated automatically from a few different processes and there is historic data I don't want to lose. </p>