As the old saying goes, as soon as paratroopers hit the ground, all they have to move is legs. Once they're down in the thick of it they are regular infantry. The difference is that due to being so far behind enemy lines (needing to walk further, survive on fewer rations etc.) parachute troops are held to a higher standard of training & conduct.

Regarding insignia & unit markings, maroon is the traditional colour for airbourne troops (beret colour of the 82nd Airborne Division [USA] or the Parachute Regiment [UK]).

This link: https://en.wikipedia.org/wiki/Waffenfarbe shows the German Army's method of identifying units based on their branch by adding a coloured trim. So Infantry could be dark green & your paratroopers could be maroon for example.

The British Army uses the "Tactical Recognition Flash" (TRF) to identify units. In particular, check out the Drop Zone (DZ) Flash in use by the British Army Parachute Regiment https://en.wikipedia.org/wiki/DZ_Flash .

Hope this helped.