anchor.diff:    * [`color.blue()`](#blue) for getting a color's blue channel.
     * [`color.hue()`](#hue) for getting a color's hue.
     * [`color.saturation()`](#saturation) for getting a color's saturation.
  +  * [`color.whiteness()`](#whiteness) for getting a color's whiteness.
  +  * [`color.blackness()`](#blackness) for getting a color's blackness.
     * [`color.alpha()`](#alpha) for getting a color's alpha channel.
   
     <% example(autogen_css: false) do %>
  
positive.code:   * [`color.hue()`](#hue) for getting a color's hue.
    * [`color.saturation()`](#saturation) for getting a color's saturation.
    * [`color.lightness()`](#lightness) for getting a color's lightness.
    * [`color.alpha()`](#alpha) for getting a color's alpha channel.
  
    <% example(autogen_css: false) do %>
  
negative.code:   * [`color.blue()`](#blue) for getting a color's blue channel.
    * [`color.saturation()`](#saturation) for getting a color's saturation.
    * [`color.lightness()`](#lightness) for getting a color's lightness.
    * [`color.whiteness()`](#whiteness) for getting a color's whiteness.
    * [`color.blackness()`](#blackness) for getting a color's blackness.
    * [`color.alpha()`](#alpha) for getting a color's alpha channel.
  
    <% example(autogen_css: false) do %>
  