title: YAML title font and color in Rmarkdown
body: <p>Is there a way to change the font and color in the YAML title in a R markdown flexdashboard?
  Here is the code for the YAML header I am trying to change:</p>
  <pre><code>---
  title: &quot;Greenhouse gases and weather data&quot;
  fontsize: 30
  output: 
    flexdashboard::flex_dashboard:
      orientation: rows
      vertical_layout: fill
      social: menu
      source_code: embed
      theme: readable
  
  ---
  </code></pre>