title: Custom colours with geom_tile
body: <p>If I have a data frame that looks like this:</p>
  
  <pre><code>    Name Track Position   Color
  1      A     0        1 #009ACD
  2      B     1       15 #50568B
  3      C     2       55 #8C7125
  4      A     0       44 #009ACD
  5      B     3       98 #50568B
  6      D     0       99 #77DF98
  </code></pre>
  
  <p>What would be a correct way to use geom_tile so that each level of the Name column was plotted with the Track as the x-axis point, Position as the y-axis point, and Color as the actual color of the tile?</p>
  
  <p>It should look something like this:</p>
  
  <p><a href="https://i.stack.imgur.com/J9qE5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/J9qE5.png" alt="enter image description here"></a> </p>