title: specify color in seaborn catplot
body: <p>I would like to specify the color of particular observations using seaborn catplot. In a made up exemple:</p>
  
  <pre><code>import seaborn as sns
  import random as r
  
  name_list=['pepe','Fabrice','jim','Michael']
  country_list=['spain','France','uk','Uruguay']
  favourite_color=['green','blue','red','white']
  
  df=pd.DataFrame({'name':[r.choice(name_list) for n in range(100)],
               'country':[r.choice(country_list) for n in range(100)],
               'fav_color':[r.choice(favourite_color) for n in range(100)],
               'score':np.random.rand(100),
              })
  
  sns.catplot(x='fav_color',
             y='score',
             col='country',
             col_wrap=2,
             data=df,
             kind='swarm')
  </code></pre>
  
  <p>I would like to colour (or mark in another distinctive way, it could be the marker) all the observations with the name 'pepe'. How I could do that ? The other colors I dont mind, it would be better if they are all the same.</p>
  
  <p><a href="https://i.stack.imgur.com/nwlnC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nwlnC.png" alt="catplot exemple"></a></p>