Now, among the heresies that are spoken in this matter is the habit of calling a grey day a "colourless" day. Grey is a colour, and can be a very powerful and pleasing colour.... A grey clouded sky is indeed a canopy between us and the sun; so is a green tree, if it comes to that. But the grey umbrellas differ as much as the green in their style and shape, in their tint and tilt. One day may be grey like steel, and another grey like dove’s plumage. One may seem grey like the deathly frost, and another grey like the smoke of substantial kitchens.