I love the deep amber. I’ve got a Millie in that colour on my list for sometime in the future.
If you wear white, denim, navy or black a lot, or at least navy/black/burgundy/olive or khaki outerwear, I’d definitely get it in the Amber rather than the navy...a little more interesting, I think. And it works for summer and winter. It would add such a nice pop of colour and brightness to dark, gloomy winter days.