[NTG-context] Colored descriptions

[Eric Détrez]

I wish to write a text where there are definitions, theorems, ...
I wish to get a table of definitions at the end so I think the right 
tool is description.
But I want the head or/and the main text have colored background.

Is it possible ?

I tried inbetween=\startframedtext,after=\stopframedtext in the 
\setupdescriptions but this lead to an error "Missing } inserted"

-- 
Eric Détrez
Informatique
Lycée Faidherbe, Lille
http://eric-detrez.fr