Submitted by Joshua Davidowitz, who says:

Love your blog and always look forward to the next posting! Anyways, I read that in Vienna, the Wiener Linien are doing a vote of whether the new U5 metro line should be in turquoise or pink.

What do you think?

As for me, I would go for turquoise over pink. The pink I find most confusing where it terminates at Karlsplatz and there is the transfer to the U1. If it was somewhere else on the line network it might work, but here it seems to blend in to the red of the U1. If they wanted pink as a line color, I might switch it to the U6 (brown).

Transit Maps says:

Now this is the kind of crowd-sourcing that I like: allowing the people of Vienna to have a say and feel involved in the process of the building of a new U-Bahn line. That said, each colour has its pros and cons for me. As Joshua says, the pink could potentially cause some confusion at Karlsplatz where it meets the Red U1, but pink has much better visual contrast where the U5 runs alongside the green U4.

Interestingly, both colours have very similar values when previewed in Photoshop using colour-blindness proofing settings, so there’s not much of a difference either way there.

In the end, I’d probably opt for turquoise, simply because it helps keep a balance between warm and cool colours on the map.

What do you think?