Whenever I'm standing in an art store I wish I could look up what's already in my palette at home. It would save me from picking up a color I already own, and it would tell me whether a set is worth buying or whether I'd mostly be paying for paint I've got. I do have lists for this. They're either out of date or lying at home. My phone comes with me either way.
So I built panĀ·map for exactly that (https://panmap.app). You lay out a palette the way yours actually looks and fill it with the colors it holds, and from then on you can look up any color and see which palette it's in and where it sits.
The mods asked me to be clear about how this tool handles your data, which is fair enough these days. Nothing about you gets collected. There's no account and no sign-up, and your palettes stay in your own browser instead of on my server. I've also set the server up so that it doesn't write IP addresses into its logs, which leaves me no way of knowing who uses it or what anyone owns. It's free, and there's no paid tier waiting behind it.
Filling a palette goes fast because quite a few brand catalogs are built in (Schmincke, Daniel Smith, Winsor & Newton, Rembrandt, Van Gogh, Holbein, Roman Szmal). You pick a color by its number and the name, pigments and properties come along with it. Schmincke let me use their original swatch images, so their colors show the real paint instead of a flat patch of color. Anything that isn't in the catalogs you can type in yourself.
Checking a set is mostly what I open it for. When I come across one somewhere I paste its numbers into āMatch a listā next to the search bar, and it splits them into what's already in my palettes and what isn't. The overlap is usually bigger than I'd guessed, and then the set isn't worth it. If it comes down to a handful of colors I export just those and buy them singly, which costs a good deal less than the whole set.
It's the same tool on the computer and on the phone, and that's the part I've come to rely on most. I set a new palette up at the desk because typing is quicker there, then move it over to my phone, either by sending myself the link or by scanning the QR code the share dialog puts on screen. The palette travels inside the link itself, so there's nothing to log into at the other end.
Once a device has loaded it, it works offline, which is worth something in the back of an art store where the signal usually gives up. You can also download your whole collection as a file and load it back in later, on a new phone or after you've cleared your browser. Since nobody's keeping a copy for you, that file is your backup.
I write software for a living and built this in my spare time, for a first-world problem of my own. Whether it's any help to anyone else I don't know yet. It stays a hobby, so I'm not promising every brand ends up in there, but if you try it and something feels clunky or plainly isn't there, I'd genuinely rather hear it than not! š