Experiments with watercolour on coloured paper today. The paper colour will change the paint colour except where you use opaque white gouache. That can either give you a white base or an opaque version of the main colour. We painted little daffodils on three colours of paper. Well, it is nearly spring. I think the last I did, on light brown paper, was best. Largely because I was getting used to the subject and zoomed in on the detail.