Swatch Says Blue Dye Rubbing Off $260 Omega Watch Is ‘Harmless’

Days after Swatch Group AG prompted a consumer craze with a budget version of its Omega-branded watch, some users began reporting a problem with their $260 purchases: They can can leave dye marks on the wearer’s wrist.

The phenomenon has been flagged by buyers of the “Mission to Neptune” timepieces in the MoonSwatch series, in complaints on social media sites like YouTube and Reddit. The company said the dye bleeding off the watch is “harmless” and a “very, very rare experience.”