I am late here and will probably echo others, but as a silver-haired forum member, wanted to chime in with my perspective.
For reference, I was born a "cool" redhead, and transitioned to fairly neutral dirty blonde as a child and teen, which I highlighted for many decades. Briefly in my 30s I dyed my hair red (it looked great, but faded fast). Then went back to chemically assisted blonde for many years. Eventually the yellows/ brassy tones started looking bad against my skin and the roots were growing out too quickly for my pocketbook. Time to go natural! I'd seen both my parents go grey so I knew it would likely suit me.
I've always approached colour intuitively. I did get a consultation once but it just affirmed what I already knew and the palette included colours I had already and always been drawn to. My neutrals are navy/ ink, denim (most shades), white, light to medium grey, the odd bit of charcoal. My metals are silver. My colours are almost all blues, cool and true reds, berry tones and fuchsia. Purples and lilacs suit me but I don't wear them often simply because I don't often find clothes I like in those tones. Very occasionally I'll gravitate toward something in teal or forest green or taupe or chocolate brown (all of which work on me)— but I don't do this often. Sticking to a limited palette means my wardrobe is very much mix-and match and most pieces work with several others.
As a blonde, I could and did wear cream, oatmeal, rusty tones, and gold jewellery in addition to the colours and neutrals mentioned above. These don't work as well now. As a redhead, those tones plus purples and greens and chocolates were especially good.
Despite sticking to a limited palette, I love all colours, so I sometimes buy accessories in contrasting (warm) tones, like a mustard bag or shoes. I'll also add "non flattering" but loved colours in prints if the print includes colours that are flattering. And burgundy is a special case. It isn't my best colour worn near my face but it's not terrible, either, and I can wear it especially on the bottom, in a pattern, or in accessories, because it blends so well with the rest of the closet.
What I have found since going silver is that I can up the intensity and the clarity of colours -- not just "can" but need to. My contrast level is low to medium (deep blue grey eyes and bright silver hair and pale skin). But my overall tone is "bright" -- bright hair, eyes, skin -- so I need some intensity to match it. In particular, I've found that white, royal or cobalt blue, and true fire engine red have become even more flattering than in the past. In other words, it's not just colour but also contrast and level of brightness that you might need to experiment with, as your hair transitions.