"Steve" wrote in message
oups.com...

OK, here's a question. If (and it's a big if) an additional line is
opened at some future point, what colour will provide maximum contrast
with all existing lines.


Well, if that happens, it will likely be after the transfer of the ELL to
the London Overground brand, and the restructuring of the other sub-surface
lines, so potentially orange and yellow/pink will both be available.

BTN