It's quite possible that I'm having a brainstorm here. But I have a (very, very) vague memory of someone saying that the different subjects had been allocated different colours: e.g. blue for English, red for Maths etc. Is this just something that appeared to me in a dream (goodness - what a very boring dream that would be)? I'm in the process of sorting out the book labels for my class and I thought I might use that colour coding if it existed. Ta.