Change color of trellis delimiter lines

[#1]

How can I change the color of the lines between two partial trellis charts? (The vertical lines in the plot below).

Does anyone know?

Cheers,

Jonas

[#2]

Does anyone have the impression that this would not be possible?

Thank you,

Jonas

[#3]

Was just having the same issue and came on here to see if anyone has an answer. I have found one way I think might work.

Under the expressions tab, in your expression , you need to add an 'IF' statement into the Background Colour category. A simple If(Dimension ='xxx',RGB(0,128,0),If(Dimension ='yyy', RGB(256,0,0))) etc should solve this.

It is a bit long, but is the only way I have been able to get arounf this.

Anyone know any other method of doing this?