Blue surpassed all other colours in the sovereignty of its presence in the world of watches in recent years. It has stood the test of time because it comes in such a remarkable variety of shades and nuances that handsomely stage complications of all sorts. The “Blue Miracle”, which began four or five years ago, has firmly established itself alongside perennially popular black and white. The radiance of the blue dials, which gleam all the brighter this year thanks to fine sunburst or guilloche patterns on many models, is all more subtle and expressive. Here is a selection from the positively overwhelming palette of blue watches at Baselworld 2018.