Gris mouette - because it is less delicate than gris pearl and, as a medium shade of grey, for me personally it can be worn all year round.
(Apologies for the lengthy comment, but maybe it will help others:
I have an étoupe H-bag. A very expensive experience for me: I bought so many clothes, H accessories (belts, wallets, card holders and more) just to make it work for me. Still, étoupe remained unflattering on me. Thanks and courtesy to
@papertiger (I can't remember where on tpf I read this) I then realised why: Some colours look best on me, when I mix warm and cool tones! So further scarves (H, of course) were bought, I no longer chose tone-in-tone for étoupe (which I usually love), but different shades of blue, black or cream/white for clothing and even some scarves with a pop of colours - now I can also wear this neutral tone for me and have an alternative to my otherwise very frequent camel, cream and grey tones.