Color manager: how is colour applied?

Hi

It seems, I am not smart enough with respect to colouration of graphs. I have applied a Color Manager node to my data and the data grid shows there is colour to the values. I can imagine that the black pole is just an indicator of colouration, but is not meant to reflect the actual colour to the value.

Having said that, I do not see the colour gradient getting applied to the graph when in a line plot.

Possibly, the line plot node is not a node where colourisation can be applied. I could not find any hint in the description neither of the line plot node regarding colouration nor of the color manager node regarding which plot nodes can make use of the colour data.

Can some one enlighten me?

Cheers

Thiemo