title: How to use the HSL (Hue Saturation Lightness) cylindric color model
body: <p>I would like to use the <a href="http://en.wikipedia.org/wiki/HSL_and_HSV#From_HSL" rel="noreferrer">HSL</a> (Hue Saturation Lightness) color model (cylindric). Maybe I missed it, but I was not able to find a function that returns colors according to that scheme. <code>hcl</code> from the <code>colorspace</code> packages uses chroma not saturation. I would like to use a model, where maximal luminance/lightness will always return the color white as in the image below. <strong><em>How can I specify colors using the HSL model in R?</em></strong></p>
  
  <p>TIA</p>
  
  <p><strong>Add on</strong></p>
  
  <p>What I get for different levels of luminance using <code>hcl</code> is this (<a href="https://gist.github.com/markheckmann/ad12685ee63cb47e9ebd" rel="noreferrer">code here</a>).
  <img src="https://i.stack.imgur.com/QIYa7.png" alt="enter image description here"></p>
  
  <p>What I want is this the HSL model.</p>
  
  <p><img src="https://i.stack.imgur.com/cLYMD.png" alt="enter image description here"></p>