Match Field via Relationship

[sirsancho09]

I have a database where I have created a global field where when I paste in a list of values it shows me the matching fields via a portal. The global field (listfind) matches a name field (design) via a relationship with an additional occurrence (designdata_match) of the main table (designdata).  That is working fine, however what I want to add in is a way to indicate if one of the values I paste into the global field is not matching in the other table. It could be as simple as highlighting the value in question in a different color. I am unsure how to achieve that. Any help would be amazing.