title: How to change colour of the survival curves in a survival ctree object r
body: <p>I am doing a survival ctree with party package (R software) and i would like to have coloured survival curves in the terminal panel.</p>
  
  <pre><code>fitform &lt;- Surv(delai_efs ,evt_efs) ~ age + sexer + ... + bmiins + tailler + 
  
  tree = ctree(formula = fitform, data = taclfknn, controls = ctree_control(teststat = "max", testtype = "Teststatistic")
  
  plot(tree)
  </code></pre>
  
  <p>I tried to change the source code integrating additional arguments like color or using <code>gp = gpar(col=...)</code> but i failed...</p>
  
  <p><img src="https://i.stack.imgur.com/cpbxH.png" alt="enter image description here"></p>
  
  <p>Any help ?</p>
  
  <p>Thanks </p>