Hi Khemadeva,
Did you have a chance to see if it is possible to assign generic color to curves since when you have many object in a scene it’s not easy to see a black line on a dark grey background.
Having the possibility to colorize the curves would greatly enhance productivity in complex scene by assigning custom color to curves quickly.
Because as for now the only way to do it is via the curves property panel by giving thickness and assigning a material.