Rəng - definition

This is how İzahlı monografik musiqi lüğəti defines rəng:

- muğam şöbələri arasında ifa olunan instrumental pyes.


- a performance of an instrumental piece of music between the sections of a mugham.

I really enjoy playing rangs. I assume that the name comes from the word for color because they add color to the mugham.