Thank you so much for the suggestions! And I had not thought about finding a certain colour and then being unable to find it again; I imagine that would be very common with light tones. I also like suntiger's suggestion of trying some slightly deeper tones instead of light-light.
Jaime, Carla, indigoprint and Unfrumped, I will try a bright white. For some reason, I had dismissed a bright white out of hand, and I am not sure why. I guess overall I am unaccustomed to wearing lighter colors at all, let alone a bright white, so it is very much foreign territory. But sometimes the simplest solution is the right one, and a bright white would certainly be easier to match than any shade of off white.
Suz, thanks so much for your thoughtful reply. Including a lighter color in patterns is a great idea, and can really tie things together. I agree about wearing a lighter neutral away from the face, too; I recently bought a clream colored skirt, but have struggled with it. Wearing it with black on top seemed too harsh, but combining that with a patterned scarf including the lighter color could really help.
Sal, that is such a great idea to do color drapes with various shades from around the house. I never thought of that, but it might really help me clarify what looks good.
Helena, I look fine in cobalt and deep navy, but not in muddier dark blues. But pale or pastel blue is my nemesis, regardless of whether it is clear or muted.
Olive Green, looking at that website, I certainly have historically dressed in cool, bright, deep winter colors. I guess I don't know for sure whether those are the most flattering, but I do gravitate toward them. I have always subscribed to the idea of dressing for one's personality, not one's coloring, but I guess one can do both. But if black is not my best dark neutral, I don't want to hear it! I wouldn't have any clothing left without it, and I depend heavily on black tights in the winter, so I'm not changing that!
I often admire your outfits and color choices, Janet, and I used to think we shared coloring. But I do think you run slightly cooler, given how well you wear all shades of blue. Still, I always look forward to seeing your outfits to see what I can copy!
Angie, I will have to give grey antoher try. I usually avoid it, as I can sometimes look a disaster in grey, but I suppose that is because it can lean warm or cool and have all kinds of different undertones, so there probably is a shade for everyone. I will look for the shades in the swatches you posted. Thank you!
Looking back on it, my wedding dress was white-white, but one doesn't realize until later in life that anything looks good on a young person! But maybe the optical white actually was more flattering to me than ivory.
I think I will try some grey, optical white and then some deeper light neutrals in the brownish range. Thanks, everyone for some good advice!