Hi Pilou,

re:
> @ Michael How gradient numbers colors itselve are made following the path ?
> Following the number of objects selected or following an arbitrary number (eg 100) ?

It is assigned by taking the center of the object's bounding box and then finding the closest point on the path curve to that center point.

Then the parameter value of that point along the curve becomes the parameter for the gradient, with the start of the curve being the start color, blending up to the end of the curve being the end color.

- Michael