title: Caption font color with kable
body: <p>Using kable() to render a simple table yields what seems to be the default pale font color for the table caption in the resulting html file. Is there a way to control the table (or figure) caption font color, size, etc?  </p>
  
  <pre><code>    ---
      title: "test"
      output: 
      html_document: 
      theme: cosmo
      ---
  
      ```{r}
      library(knitr)
      tab.1 = table(mtcars$cyl, mtcars$vs)
      kable(tab.1, caption="Table 1: Caption Font Color")
      ```
  </code></pre>