The easiest way to change the parcel boundary colour is to choose a different theme off the Themes menu (Available in QuickMap Version 7.0 or better). If you cannot find a theme that meets your requirements, you can manually change colours, shading patterns, line styles and much more using the symbology editor.

Refer to Help –> Contents –> “Changing the Way Your Maps Look Using Symbology”, for more details on how to do this.