I am not much of a CSS guy. Would someone be able to give me a hint on how to change the Fountain Fill background colors?
 
Thanks in advance.
 
 
Sorry thats Viart 4.05, my bad.

I have found the answer by poking around a bit. Not sure why these details are not mentioned anywhere in the manual but it appears for the rainbow style the gradient color is achieved by a couple of image files located in the image\rainbow folder.
 
G

Yes, if it is the same as in 3.6, the graduation is a 1px wide vertical line