Colourful watches showcasing a rainbow of bright hues are among this year's most eye-catching new releases, with shades from sorbet to psychedelic drawn in precious stones and unexpected materials. From the green tones of Zenith, Montblanc, Bulgari and Hublot, to the pretty in pink Piaget and Tag Heuer and the blue tones of Vacheron Constantin and Bell & Ross – not to forget the delicious pick'n'mix from Van Cleef & Arpels – discover the exquisite new watches here.