Hi Stefan,

I think that a traditional Moi script, with user interaction would be relatively easy.

Outlining the steps, defining the requirements:

Have an existing styles set with good candidates for start and end colors.
Get style index for next new style color to be added to styles.
Select objects.
Select start color.
Select end color.
Code will have loop(s).
Compute HSV gradient, and save each color to end of Styles list.
Cycle through objects, and gradient styles by index, and sequentially apply the colors.
Option:Delete the new gradient styles.

-B