At the moment I'm heavily involved in refreshing essentials and wardrobe workhorses, and so I have a heavy emphasis on neutrals. Black may not be as flattering as ink blue but I have to be realistic here -- as a petite, I'm far more likely to find an essential/basic in black, not ink blue, and when it comes to essentials, FIT is more important to me than color.
That said, if I do find an item offered in ink blue, I may buy it. Assuming it's rich enough. Because not all ink blues are created equal. I have a seriously poisoned eye for flat navy's.
Gray's -- I look good in some grays and not others. Light grey is lovely as can be, and one of my favorites. Charcoal grey can work, with the right touch of sheen. Flat dark grey.. death!
Taupe's are particularly hard. Not all taupe's are created equal. Depends on the undertone, warm vs cool. Whites vs cream... same thing!
Black may not be most flattering but it's EASY. Because it's, well, it's just.. black. But still I do try to add black with depth, texture, sheen. Angie taught me that years ago when I first joined, and I've tried to hold myself to it. If I buy something black, it has to have a little something special.
Then I add scarves... scarves are miracles. Black top with a scarf in a magical skin flattering color - I am set.
As for non-neutral colors, I also look best in jewel tones. I have a list of colors that just do not flatter me at all, mostly anything warm toned/orange based. If they are on trend and I want to incorporate them, I do so very sparingly and away from my face. So for example maybe a clutch or a shoe.