title: Scatterplot with 'continuous bivariate' color palette in python
body: <p>I have been able to plot scatter with color palette representing the continuous variable using following script:</p>
  
  <pre><code>import numpy as np
  import seaborn as sns
  import matplotlib.pyplot as plt
  
  x, y, z = np.random.rand(3, 50)
  cmap = sns.cubehelix_palette(start=5, light=1, as_cmap=True)
  
  fig, ax = plt.subplots()
  points = ax.scatter(x, y, c=z, s=20, cmap=cmap)
  fig.colorbar(points)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/0d6hq.png" rel="nofollow noreferrer">Output univariate palette</a></p>
  
  <p>However, I need to create a map with 'bivariate color palette'. I will ultimately be creating map like this but at the time being I am looking for plotting scatter in such a way. (Source : <a href="https://www.linkedin.com/feed/update/urn:li:activity:6378928737907466240" rel="nofollow noreferrer">https://www.linkedin.com/feed/update/urn:li:activity:6378928737907466240</a>)
  <a href="https://i.stack.imgur.com/T0aAU.jpg" rel="nofollow noreferrer">Bivariate palette</a> 
  I am looking to plot scatter such that the color represents both variables RMSE and R as in the map.</p>