Hi Eric
Not a direct answer, but Microsoft offers this:You can use copy and paste, to make a duplicate copy of any form or report.  Also, if you have two forms (or two reports) in design view, you can copy any of the form (or report) objects.  For example, if you have a Combo Box on one form, and you want the same Combo Box on a different form, put both forms in design view, and use copy and paste.  You can also import/export forms or reports, from one Access database into another Access database.  Within Access, if you click, or right-click on various things, you will often see the words "copy, paste, import, export", and this will show you the places that you can do this.  You can also drag-and-drop forms/reports from one database to another database.

Rick also has great videos on Conditional formatting and also an Extended Cut. Also Expert 19.  In some cases the Mocrosoft copy and paste may work for you
HTH  John

Maybe Microsoft would appreciate it if I spelled their name correctly. : )

When you copy a textbox or combo box on one form and paste it to another form, its conditional formatting will carry over.

In VBA, you use the FormatConditions object to create and modify conditional formats.  This is covered in the Access Developer 40 course.

Expanding on Kevin Yip's reply -
Once you have the conditional formatting set up on a field, there isn't a direct way to copy the same.
You can, however, use the Format Painter (the little paint brush on the menu bar) to "transfer" all the formatting attributes to another field.

Conditional Formatting
Conditional Formatting Null