title: ggplot conditional scale_fill_manual colors
body: <p>Hoping to set two different color schemes for my ggplot based on a value in a certain column.</p>
  
  <p>This is my data:</p>
  
  <pre><code>itemName = c("item1", "item2", "item3", "item4","item5", "item1", "item2", "item3", "item4", "item5") 
  MPindex = c(124, 118, 101, 112, 126, 124, 118, 101, 112, 126)
  code = c("A", "A", "A", "A", "B", "A", "A", "A", "A", "B")
  topTwo = c(55.6, 53,45.2, 50.2, 56.2, 55.6, 53, 45.2, 50.2, 56.2)
  variable = c(4, 4, 4, 4, 4, 5, 5, 5, 5, 5) 
  value = c(37.2, 36.2, 31.4, 31.2, 34.2, 18.4, 16.8, 13.8, 19, 22)
  
  testNew&lt;-data.frame(itemName,MPindex,code,topTwo,variable,value)
  </code></pre>
  
  <p>And this is as close as I've gotten with the graph I want:</p>
  
  <p><a href="https://i.stack.imgur.com/ZJmiQ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZJmiQ.jpg" alt="enter image description here"></a></p>
  
  <p>What I want though, is for the item with code=="B" to have different scale_fill_manual values. Note the order of the bars might change and the itemNames might change since this is reactive within a shiny app, so rather than manually setting item5 bar to be different, I really need it to go off of the "code" column.</p>
  
  <p>Current graph code:</p>
  
  <pre><code>  p14 = ggplot(data = testNew, aes(x=reorder(itemName,-MPindex),y=value,fill=variable))+blank_theme+
  geom_bar(stat="identity")+geom_text(aes(label=paste(value,"%")),vjust=1.2,colour='white')+theme(axis.text.x = element_text(angle = 45,hjust=1.00,vjust = 1.15))+
  xlab("")+scale_fill_manual(values = c("#33CCCC","#00A499"))
  
  blank_theme &lt;- theme_minimal()+
    theme(
      axis.text.y = element_blank(),
      axis.title.y = element_blank(),
      panel.border = element_blank(),
      panel.grid=element_blank(),
      axis.ticks = element_blank(),
     plot.title=element_text(size=14, face="bold")
    )
  
  p14
  </code></pre>
  
  <p>And I want the code=="B" item to always have scale_fill_manual(values=c("lightgrey","grey"). </p>
  
  <p>Thanks in advance! :)</p>