You confuse me when you say "fields" - I'm guessing you mean "bound textboxes".
In your code for your search, if it is successfull then yuo can change the forecolor, backcolor, or bordercolor of your controls using those properties.
i.e
Me.txtName.BackColor = RGB(255,0,0)
Me.txtName.BackColor = 255
Me.txtName.BackColor = vbRed
Incidentally, all three of those lines will change the backcolor of a textbox to red.