Hasta La Motion!

Hi, i was trying to change the color parameter of a rotopaint node. The problem when i use knob(‘color’). It points to color of a selected spline/bezier. How if i want to change the color parameter regardless any selected bezier (i want to use this color for next painting not the existing one). the knob(‘color’) is modifying the color param on the parameter window, this is not i want. I want to change the color parameter which is on the top of the viewer (when the rotopaint is active).

thanx