It’s always a bit disturbing to have brand loyalty for spurious reasons, especially when you know it’s exactly what the corporation intended. It’s idiotic, but give me a row of petrol stations and I scan for BP’s greenwashing green and yellow because they makes me feel optimistic in comparison to yellow and red, or black, blue and red.

Boycotting BP is not a particularly rational response to their disastrous handling of the oil rig disaster either. There are plenty of other oil corporations probably operating under equally dodgy regulations, and it doesn’t touch the key issue that we are hitting our limits. But there is a bit of satisfaction in abandoning them.

I must have pretty strong colour association. I found myself reaching for my purple tape measure the other day and half expecting chocolate.