title: XML Odoo field conditional color formatting
body: <p>I'm working with Odoo and studio. </p>
  
  <p>I want to format a selection field text based on the selected value using XML.</p>
  
  <p>Here is what I have already tried but it has no effect at all:</p>
  
  <pre><code>&lt;field name="my_status" string="Status" colors="orange:my_status == 'negotiation';green:my_status == 'signed';purple:my_status == 'internal'"/&gt;
  </code></pre>
  
  <p>I have also tried:</p>
  
  <pre><code>&lt;field name="my_status" string="Status" decoration-success="my_status == 'signed'" decoration-danger="my_status == 'negociation'" decoration-muted="my_status == 'internal'"/&gt;
  </code></pre>
  
  <p>Do you know what I am missing for it to work?</p>
  
  <p>EDIT: I found this, I guess I can't color format any of the fields? <a href="https://github.com/odoo/odoo/blob/12.0/odoo/addons/base/rng/common.rng#L206" rel="nofollow noreferrer">https://github.com/odoo/odoo/blob/12.0/odoo/addons/base/rng/common.rng#L206</a> </p>