I would like to color a single value, based on a field value that is not the one displayed in the panel. I was able to do so previously using the classField option; however, since it is deprecated in 6.4 ,I'm not sure how I would do this.
You might have already resolved the problem but in case you haven't - I am still using the single panel color coding using range with a minor workaround
<single>
<title>Status</title>
<search>
<query>my search|eval range=if(Status < 1,"severe", "low") |table range Status </query>
<earliest>-60m@m</earliest>
<latest>now</latest>
</search>
<option name="classField">range</option>
<option name="field">Status</option>
</single>
Two things to remember :
Hope this helps!
Did you work this out? I'm trying to do exactly the same thing.