In the after update event of your combo box use something like
Code:
Me.YourComboControlName.FontBold = False
Me.YourComboControlName.ForeColor = VbBlack
If Me.YourComboControlName = "Safety" Then
Me.YourComboControlName.FontBold = True
Me.YourComboControlName.ForeColor = VbRed
End If
Substitute YourComboControlName for the name of your combo control.
If you can scroll through different records on your form then you would need to add the same code to the OnCurrent Event to update the combo based on the current records state.