">    Args:</span>
<span class="sd">        :h1:</span>
<span class="sd">            | hue for sample 1 (or hue difference if h2 is None)</span>
<span class="sd">        :C1: </span>
<span class="sd">            | chroma of sample 1 (or prod C1*C2 if C2 is None)</span>
<span class="sd">        :h2: </span>
<span class="sd">            | hue angle of sample 2 (if None, then h1 contains a hue difference)</span>
<span class="sd">        :C2: </span>
<span class="sd">            | chroma of sample 2</span>
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