December wedding

Sorry if this isn't a helpful comment lol but I find myself in the opposite situation. Because of the colors and things I look up on Pinterest (smores and hot chocolate bar), Pinterest thinks I'm having a winter wedding! I'd say go for it - I don't think it will seem off, and it's nice to do something a little bit unexpected.

Congrats on the engagement!!

But also, don't worry about if your colours "suit" the season. Me and my cousin in-law ended up having the same colours (both got married last year) and her wedding was in summer while mine was in fall and they both looked fine (ok, mine looked better ).

I would do whatever colors you want dont worry about the season. the warm colors will be so nice in cozy winter time!!

If you're concerned about it flowing with the season, throw a deep navy in there as an accent color. You can add a color in very subtle ways (like one type of flower in an arrangement or candles) that won't be the focal point for your color scheme but also give it that "wintery" vibe.

I'm having a February wedding and my colours are red, blush and silver. I love them together. Sage is good for any season.

Welcome to wedding wire Jenelle!
I totally agree with the others there is no reason not to have the colors you want. Blush and sage in the snow sounds divine.
We're getting married in October, but we aren't having a "Fall Wedding", no rustic elements, no earthy fall colors, not a pumpkin in sight (I keep needing to remind my future MIL as she sends me ideas) because those aren't our style. Black, gold, with white flowers and greenery. Our photos might have a bit of foliage but that'll be it!

The colours you have chosen are great towards the winter season in different shades. Not all christmas weddings have to have that festive colours as a must.
Its your day and choices ti make the day all about you two.

We're doing a winter wedding and our colours are blush rose and lavender. I say pick whatever colours you want! Those rules of what colours you HAVE to have based on the season are arbitrary anyway. I think dusty rose and blush would look beautiful against a snow white backdrop.

Pick the colours you want! There is nothing wrong with choosing the colours you love. And I think dusty rose and sage would look beautiful for a winter wedding. And I think they would go great with your FH's charcoal grey suit and against possible snow. Bridesmaids could wear dusty rose dresses and have their bouquets be made up of more greenery than flowers, like succulents instead, which would also be cheaper during the winter months.