 of test data.</span>
<span class="sd">        :xyzr:</span>
<span class="sd">            | ndarray with tristimulus values of reference data.</span>
<span class="sd">        :dtype:</span>
<span class="sd">            | &#39;xyz&#39; or &#39;lab&#39;, optional</span>
<span class="sd">            | Specifies data type in :xyzt: and :xyzr:.</span>
<span class="sd">        :xyzwt:</span>
<span class="sd">            | None or ndarray, optional</span>
<span class="sd">            |   White point tristimulus va