[Therion] Color for one scrap in a Project

[Markus Boldt]

Is it possible to define color-map fg only for one scrap in a Project of
about 50 scraps in several surveys? 
I have an "all-thconfig" file for this Project and there I have defined a
light yellow for the cave. And in the scrap which I want to have in very
light grey I have defined this very light grey, but it will overwritten. 
Many thanks for Ideas. 
Markus