A recent post by inspired me to share this. Randy's solution is also great so check that out!

With Swatch Library you can create a palette per brand or project, and every swatch is one click to copy, in hex or RGB. Nothing to install, no sign-up, and nothing stored on a server. Your colours save automatically in your own browser.

Type or paste a code, bulk-paste a whole list at once or, in Chrome/Edge, use the eyedropper to pick colours from anywhere on your screen, a client's website, a brand PDF, a Storyline slide. You can drop a logo or brand asset onto the tool and it will pull the dominant colours out and build a palette from them. Everything happens in the browser, nothing is uploaded anywhere. You untick any strays, name it, and it is done. I find this the quickest way to get a client palette in.

Beyond that there is a WCAG 2.2 contrast checker built in, set a foreground and background colour, get the ratio, and see pass/fail for AA and AAA body text, large text and non-text elements like icons and focus indicators. That is useful enough on its own, but the thing I am most pleased with is the contrast grid. Each palette has a Grid button that opens a matrix of every colour pair in that palette, painted with the actual pair so you can see at a glance which combinations work for text and which do not. One click on any cell opens the full checker for that pair. If you have ever wondered whether your brand colours are actually safe to use together, this answers it quickly.

There is also a colour vision preview. A Vision button on each palette shows it as it appears to people with protanopia, deuteranopia and tritanopia, plus a greyscale row for print. It automatically flags any pairs that become hard to tell apart, named with their perceptual distance score.

Each swatch has a tints and shades button that opens a nine-step ramp from light to dark, and you can click any step to copy it or add it to the palette. Useful for hover states and backgrounds.

You can drag swatches to reorder or move them between palettes, filter palettes once your library grows, and use Export/Import to back everything up or share a brand palette file with your team so everyone's working from the same set. There's a built-in guide for the full tour. It can be used directly in the linked Rise course, or used online via the link.

All free, no downloads, no signup, no nonsense!

Swatch Library - Rise

Swatch Library Online

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