Here we have a version in colour, plus black and white rendition of his painting of Napoleon visiting Frederick's Tomb. Would be good to see the latter in colour.

https://www.europeana.eu/portal/en/explore/people/50697-heinrich-anton-dahling.html

My understanding is his painting of Napoleon entering Berlin is also excellent and near contemporary - but from the very small reproductions I've viewed I cannot tell what uniform he is wearing.

A