Three of the four gold MoonSwatches frame their gold in the dark. This one does the opposite, and it changes every strap decision you'd otherwise make.
The Cold Moon is white the whole way through: matte white Bioceramic case, white crown and pushers, white bezel, a frosty white opaline dial with recessed sub-dials and a soft circular grain — even the factory strap is white. One writer called the whole watch a blank canvas, and that's exactly right.
And then there's one dark thing on it. The moon phase at 2 o'clock sits on a sparkly dark blue disc carrying two full moons coated in OMEGA's Moonshine Gold, one of them a lasered snowflake that is different on every single example. That disc is roughly the size of a fingernail, and it is the only place on the watch where anything goes dark.
So the strap question here isn't "how do I make the gold look rich?" — the usual answer, and the one our other gold guides give. It's "how do I avoid putting a second dark mass on a watch built around one small one?"
The size: 20mm
This takes a 20mm strap, like every MoonSwatch. Same 42mm case, same width across the collection, and one reference source states 20mm for this model outright. Nothing to measure.
Worth knowing before you shop: our mission collections are a colour menu, not a compatibility list. Every MoonSwatch strap we make is 20mm with the same 126mm and 78mm lengths, cut for the same case. A strap filed under another mission fits this one exactly as well as one filed here — and three of the four picks below come from elsewhere.
The strap isn't the weak point here. It's the wardrobe problem.
A note that applies to this reference and almost nothing else in the collection.
Most MoonSwatches ship on woven hook-and-loop, and most of our guides spend a paragraph on why that's the part that ages. The Cold Moon doesn't. It comes on a white rubber strap with a Velcro closure and a Bioceramic loop — the material question was settled at the factory, exactly as it was on its navy sibling.
The problem is different, and it's a seasonal one. This watch was sold through winter, to be worn through winter, on a white band. White rubber is the single least forgiving colour there is against wet cuffs, road grit and salt — it doesn't fail, it just stops looking crisp, and crisp is the entire point of a watch that presents itself as a blank canvas.
So the honest advice isn't to replace the factory strap. It's to own a second one and rotate: something that shrugs off a wet February, with the white kept for the months when it looks its best. That's a wardrobe decision rather than an upgrade, and it's the one this reference actually needs.
One practical note while you swap. Bioceramic is hard but marks more easily than steel, and the case is a monobloc that can't be sent away for a tidy-up — so work on a soft cloth, keep the spring-bar tool square to the bar, and keep metal away from the case flanks. On a matte white case, any mark shows immediately.
The best straps for the Cold Moon
1. White on white — keep the blank canvas
The purist answer and the one that respects the design. A tone-on-tone white strap continues the case, bezel and dial into the band without interruption, so the watch stays one uninterrupted white field with a single small dark disc set into it. That disc is the whole idea; everything else on this watch exists to make it the only thing you look at. Start here, and treat it as the fair-weather option.
2. White with blue — the family colour, and the disc's
The pick cut for this family, and the only one from its own collection. A white and blue strap keeps the white field intact while picking up the one other colour the watch actually contains — the blue of the moon disc, and of the EarthPhase family it belongs to. It's the closest thing to a factory alternative, and it makes the disc look deliberate rather than incidental.
3. Black — give the gold the other treatment
The deliberate opposite, and worth trying once. Gold reads richest against black; that's why jewellers use dark trays, and it's what our other gold MoonSwatch guides recommend. A black rubber strap imports that logic here — a dark band below a white case makes the two gold moons the warmest thing in the frame and turns the whole watch high-contrast. It fights the blank-canvas idea, which is exactly why some owners will prefer it. It's also the practical winter strap.
4. Beige with white — the alloy's own colour
The technically correct warm option, and it isn't the obvious one. Moonshine Gold is a paler alloy than traditional yellow gold, which is why brown — the classic gold partner — sits too dark and too red against it. A beige strap with a white line is the closest warm tone we cut to that alloy, so it echoes the moons rather than arguing with them, and the white line keeps it tied to the case. The warmest this watch can go without going wrong.
The short version
20mm. White on white to keep the canvas blank, white and blue for the family colour, black to give the gold the jeweller's treatment, beige to echo the alloy itself.
Every strap in our EarthPhase Moonshine Gold collection is cut for this case, ships with spring bars included, and carries a lifetime warranty on rubber — with free worldwide shipping and no import costs, part of why more than 50,000 customers have trusted us with their watches. There's a full MoonSwatch strap guide covering every mission if you own more than one. Helvetus is not affiliated with Swatch AG or Omega SA.
