Political colours

In Australia and the UK, the traditional conservative parties both associate with the colour blue.

Recently in both countries they have lost voters to the social progressives, actually called the Greens in both countries, named after the trees they were originally formed to protect.

The resulting voting block is called teal in Australia and turquoise in the UK.

I’m suspecting this difference suggests something deeply different about the starting blues.

Or the sunburnt country just doesn’t do green properly?