As much as I like the idea of muted tones –– sage green, stone grey or the moody blue of an overcast sky –– I simply cannot resist the punch, wallop, bam of a bold colour. If I could nip over to London for the day, I would spend at least half of it at the Tate Modern’s current Sonia Delaunay exhibition. Now, there’s a woman who understood colour. “Skin of this world of ours” is how she defined it. Her Citroën, painted in multi-coloured blocks, became a Jazz Age icon; here she is in 1925 wearing a coat and dress to match the car.