Reference: selectColour
selectColour(0) displays a Rejbrand Colour Selector dialog, in which the user can select a colour. The colour-code is returned.
selectColour(c) displays a Rejbrand Colour Selector dialog, in which the user can select a colour. The colour-code is returned. The default colour has the code c.
selectColour(c, str) displays a Rejbrand Colour Selector dialog, in which the user can select a colour. The colour-code is returned. The default colour has the code c, and the title of the dialog is str, a string.