In noweb mode, I would like to make the doc chunks and code chunks easier to distinguish.
For example, a slightly different background color for the code chunks.
One possibility would be to define a new face for the minor mode of the code chunk, but then that face would also apply when editing a buffer in that mode.
Another possibility would be to create an overlay for the code chunks.
I've googled this for quite a while and have found nothing. Any tips would be appreciated.