title: GGplot does not change color of scatter plot but does on other plots
body: <p>I have a script that creates scatter a scatter plot and two bar charts from my data. Everything works fine except that when i try to change the colors of the scatter plot it does not work and they remain the standard ones. </p>
  
  <p><a href="https://i.stack.imgur.com/MfEai.jpg" rel="nofollow noreferrer">bar chart</a></p>
  
  <p>I want to take the red and gray colors (#f40009 and #8e8f90 respectively) from the bar chart and color the scatter plot with them, but it does not work.</p>
  
  <p>Does anyone have an idea as to why this is happening and how to work it out?</p>
  
  <p>The code for the scatter plot is the following:</p>
  
  <pre><code>lof &lt;- 2
  days &lt;- 3
  plot2 &lt;-ggplot( data3, aes( CE11000_ERLOS, Z_UCS))+
    geom_point(aes(colour=ifelse( data3$LOF&gt;lof &amp;  data3$Z_LAST_DAYS&lt;days &amp;  data3$CE11000_ERLOS&gt;100,"#8e8f90","#f40009")), size = 3)+
    labs(list(y = "Unit cases", x = "Gross sales revenue"))+
    ggtitle(bquote(atop(.("Visualization of Outliers"), atop(italic(.(country)), ""))))+
    scale_colour_discrete(guide = guide_legend(title = NULL), labels = c("Outliers", "Not outliers"))+
    theme(plot.title = element_text(hjust = 0.5))+
    geom_text(aes(label = ifelse( data3$LOF&gt;lof &amp;  data3$Z_LAST_DAYS&lt;days,paste( data3$Z_CDOW, data3$CE11000_BUDAT2,sep = "\n "),""),hjust=1.05,vjust=1), size = 3.5)+
    scale_y_continuous(labels = comma)+
    scale_x_continuous(labels = comma)
  
  print(plot2)
  </code></pre>
  
  <p>The data is:</p>
  
  <pre><code>LOF  Z_LAST_DAYS CE11000_ERLOS Z_UCS  Z_CDOW    CE11000_BUDAT2
  3.1  1           996789        21195  Thursday  20170126
  1.01 23          11912948      210839 Wednesday 20170104
  1.4  22          14322767      257269 Thursday  20170105
  1.01 21          11817447      185197 Friday    20170106
  1.66 18          7906971       153807 Monday    20170109
  </code></pre>
  
  <p>And this is the result <a href="https://i.stack.imgur.com/nOj8i.jpg" rel="nofollow noreferrer">scatter</a></p>