title: ggsci colour not mapping
body: <p>Having issues mapping the colour palettes to my graph.</p>
  <p>Have tried method on ggsci site, below, and a method found in this forum, below that. Neither mapping. Any help appreciated.</p>
  <p>Method 1: Fill black, add theme_bw(), then append the colour palette.
  Have tried swapping out fill for colour etc.</p>
  <pre><code>p1 &lt;- TidySymptoms %&gt;% 
        count(word, sort = TRUE) %&gt;% 
        filter(n &gt; 150) %&gt;% 
        ggplot(aes(n, word), fill = n)+
        geom_col(fill = &quot;black&quot;) + 
        labs(x = &quot;Count&quot;, y = NULL) + 
        theme_bw()
  
  p2 &lt;- p1 + scale_fill_jama()
  p2 
  </code></pre>
  <p>Method 2: using scale_color_manual</p>
  <pre><code>p1 &lt;- TidySymptoms %&gt;% 
        count(word, sort = TRUE) %&gt;% 
        filter(n &gt; 150) %&gt;% 
        ggplot(aes(n, word), colour = word)+
        geom_col() + 
        scale_color_manual(values = pal_jama(&quot;default&quot;)(5))+
        labs(x = &quot;Count&quot;, y = NULL) 
  </code></pre>