Can be both a colour that the British Army uses a fair amount of, and also an attitude.
As a colour, it's a mix of blue and yellow.
As an attitude, it's a mix of tofu-knitting Earth Mother hippy save the gay disabled lesbianwhales general lack of personal hygiene, allied to an overweening bossiness that is otherwise only seen among the ranks of Neu Arbeit.
Global warming is a problem.
If your house is less than 60 metres above present sea level and you don't like sunshine.
My house is on a hill and a tan rather suits me, so I drive a large petrol-engined car and sponsor a chap in Brazil to burn as much rainforest as he can get round with a flamethrower and thermite grenades. I worship at the teak & panda-skin statue of Jeremy Clarkson.