The other day on the train I noticed, in the midst of the morning commuter crowd, a woman with large hair who was wearing a green mini dress and pinky-orange faux fur coat. She really stood out of the pack of corporate blandness and sensible retirees who make up a 9am train to the city. I love stuff like that, it's nice to see someone doing their own thing.
I think if you could the train an hour earlier, you'd probably see a lot more colour. There's definitely a demographic shift after off peak rates and free gold card travel kick in at 9am.
Even among the corporates, bright shirts and brightly coloured hair aren't uncommon in a government office building.