[NTG-context] Placing table of contents in a frame

I'm trying to move a newsletter from a DTP program to ConTeXt. In this layout we have a blue column on the left side of the page with a table of contents. I played around with the framed command and layers, but did not find a way to put the TOC in a frame at a specific location. What would be a ConTeXt way of doing this? Regards, Frank