Highlighting a record in a table

Hello!

I have a simple app with 4 tables containing information regarding documents. One of the fields on the form for each table is the date the document was implemented. How can I potentially highlight the record for a specific document to red/yellow if it has been over 1 year since the implementation date. I would like to do this without having to create relationships or additional tables. Is it feasible? If so, what's the best way to achieve this? 

Thanks for the help!

------------------------------
Karan Joshi
------------------------------