SET_DEFAULT_PART_COLOR defines the color attribute automatically attached to a part.
Until the default is reset, whenever a part is created it is assigned the default color.
---->(SET_DEFAULT_PART_COLOR)--->---|GET_RGB_COLOR|---->
SET_DEFAULT_PART_COLOR :HSL 0.4,0.78,0.98
Alternatively, you can use the HSL and RGB sliders on the color menu to specify the default part color.