soothing paint colour chat

[Seasidetrains]

i'm on the look out for nice paint colours for a new room. sometimes i see colours i love but i'm not sure what they are. does anyone recognise this colour and know what dulux/farrow ball/whatever shade it is?
www.rightmove.co.uk/properties/127798091#/media?channel=RES_BUY&id=media1&ref=photoCollage
it's greyish, but with a slightly cooler hint of maybe green?

Tranquil Dawn?
Polished Pebble?
Goose Down?
Frosted Steel?
Misty Mirror?
Coastal Grey?

Can you tell we’re decorating?

It looks quite close to F&B ammonite to me. The bathroom is closer to skimming stone

ooh i like the dulux 'tranquil dawn', thanks!
we used to have f&b ammonite and it looked different to that, more of a flat grey... i know their colours look very different depending on the room and the light, though.