 class="o">=</span> <span class="p">(</span><span class="mf">0.45</span><span class="p">,</span><span class="mf">0.45</span><span class="p">,</span><span class="mf">0.45</span><span class="p">)</span> <span class="c1"># TM30-20 recommends (166/255,166/255,166/255), but this does not provide enough contrast </span>
        <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">nhbins</span><span class="p">):</span>
 