 <code>h1</code> and ending hue <code>h2</code>).
(b) Instead of a decreasing chroma a triangular chroma trajectory can be employed
from <code>c1</code> over <code>cmax</code> to <code>c2</code> (or equivalently a vector <code>c</code> of
length 3). This yields high-chroma colors in the middle of the palette that are
more easily distinguished from the dark and light extremes. Finally, instead of
employing linear trajectories, power transformations are supported in chroma and
luminance via a vector <code>pow