nd power parameter(s) <code>power</code>
(or <code>p1</code> and <code>p2</code>) are used. For more flexible diverging palettes without
the restrictrictions above (and consequently more parameters)
<code>divergingx_hcl</code> is available. For backward compatibility, <code>diverge_hcl</code>
is a copy of <code>diverging_hcl</code>.
</p>
<p>To facilitate using HCL-based palettes a wide range of example palettes are
provided in the package and can be specified by a name instead of a set of
parameters/coordin