Kevin,
I'm not sure if you found the answer or not, but I'm posting this in the hopes that it may help not only you, but those who are searching for the answer.
In ExB Query under Actions - Message Action, you will need to add a new trigger and select Records Created – Map – Show on Map. Select Use custom symbols. If you already have the Records Created trigger, make sure it is a Show on map trigger.
Click on Use custom symbols. Here you will find the configuration where you can change the default colors of the search results. You can configure the colors for point, line, and polygon search results.
I hope this helps.