anchor.diff:  [unitless]: ../values/numbers#units
   
   See also:
  +
   * [`scale-color()`](#scale-color) for fluidly scaling a color's properties.
   * [`change-color()`](#change-color) for setting a color's properties.
   
  
positive.code: Returns the HSL saturation of `$color` as a number between `0%` and `100%`.
  
  See also:
  * [`red()`](#red) for getting a color's red channel.
  * [`green()`](#green) for getting a color's green channel.
  * [`blue()`](#blue) for getting a color's blue channel.
  
negative.code: [unquoted string]: ../documentation/values/strings#unquoted
  
  See also:
  
  * [`red()`](#red) for getting a color's red channel.
  * [`green()`](#green) for getting a color's green channel.
  * [`blue()`](#blue) for getting a color's blue channel.
  