One colour

Brief

Pick a colour, any colour. But just the one. This might sound simple enough, but life is multicoloured, so this might be an opportunity for some still life fun, or close-ups of just one object, or for the eagle eyed to find situations in the real world where the same colour occurs in abundance. Submitted images might contain a very small amount of other colours, or subtle changes in tone between the different subjects and elements in the frame, but the image must overwhelmingly be of one obvious colour.