Blacks and greys are year-round staples for me, though I tend to wear a bit less black and lighter greys when it's warmer out.
I never wear straight white or cream -- only mixed into patterns. I usually have one or two beige/taupe bottoms in rotation in the summer but never wear it near my face. White and warm-toned neutrals wash me out or make me look a little sickly.
I love olive and navy, though, oddly, I don't have much of either in my wardrobe right now. I do wear dark jeans a lot (a year-round item in my climate), which probably explains the navy. The few items I do have in those colors tend to be more winter items than summer.
This is pretty on-topic for me right now, because I have three items on order right now: a lighter-wash pair of jeans, an olive sweater and a taupe skirt.