title: gradient color in bar ggplot
body: <p>I want to put the same gradient colours as the legend, but in the bars, not in numbers. How I do it?</p>
  <pre><code>ggplot(francia, aes(x = reorder(Equipo, Gls.), y = Gls., colour = Gls.)) +
      geom_col( aes()) + 
      labs(title = &quot;Goles por equipo&quot;, x=&quot;Equipos&quot;, y= &quot;Goles&quot;) +
      geom_text(aes(label = Gls.), nudge_y = 2) + 
      coord_flip() +
      scale_colour_gradient(name = 'Goles', 
                            low = &quot;Black&quot;, high = &quot;green&quot;) +
      theme(panel.background = element_rect(fill = &quot;grey&quot;), strip.background = element_rect(fill=&quot;francia&quot;))
  </code></pre>
  <p><img src="https://i.stack.imgur.com/cSflu.png" alt="This is my plot" /></p>