title: Convert RGB values to color wheel coordinates
body: <p>I have a picture of a color wheel from google and now I would like to find a way to somehow calculate the x and y coordinates of any rgb color in the color wheel.
  If that was a little bit confusing Ill try to explain it a little bit better:
  I have a picture of a color wheel - like you have in paint.net to select a color. I also have a color in form of rgb values. Now I want to get the x and y coordinates of the picture that have exactly that color.
  I however do not have any idea how one could do that. I am trying to use this in an App created with MIT App Inventor 2, what limits my abilities a little. So the best thing would be a mathematical only solution.
  I hope someone here can help me with this.
  <br><br>
  Edit: So here you have the picture I'm using. I actually wanted to have this in here all the time, but forgot it...</p>
  
  <p><a href="https://i.stack.imgur.com/01XJ7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/01XJ7.png" alt="enter image description here"></a></p>