&gt; Matlab is using a roughly perceptually linearly luminant colormap they call Parula now. Good job Matlab.<p>And Matplotlib is switching to a perceptually-linear default colormap called &quot;viridis&quot; with the 2.0 release (due early this month): <a href="http:&#x2F;&#x2F;matplotlib.org&#x2F;style_changes.html" rel="nofollow">http:&#x2F;&#x2F;matplotlib.org&#x2F;style_changes.html</a>