[NTG-context] Manipulating the left blank page when chapter starts on the right page

Hi all, in my document \startchapter and \starttitle starts a new chapter on the right (odd) page. So sometimes, there is a blank even page just before a new chapter. I would like to manipulate this blank even page. There are several things I would like to do, eg. having no headers and footers, setting the background color to a named color, placing an image or some graphics on the page. Is there a way to define such a page, name it and call it in \startchapter so that it is placed on the left side. I would like to use the blank pages in an attractive way. Imagine eg. a title image on the left page while the headline of the chapter is on the right page. TIA juh