All the answers I found for this issue propose to create a calculated record that would be used in the colour assignment but it works well only for data in bar chart format (or in generally - discrete).

What I want to do is to have my line bi-colour - I have a set of discrete values  and two adjecent dots are connected with a line. When the line is above a referenced value I want the line to change colour.

Is this even possible in tableau?