Color card maker
Lay a set of colors out on one legible sheet: three layouts, PNG download, straight to print. The current state lives in the URL, so whoever opens your link sees the same card.
Each swatch carries RGB and HSL next to the HEX, so a printed sheet can go straight to whoever builds it. Share links hold up to 12 colors; anything beyond that is dropped. The download is a PNG drawn at double pixel density, so it stays sharp in documents.
No colors yet. Add one, or open a palette and use "Make a color card".
Choosing a layout
The row layout suits a handful of colors: everything on one line, like a swatch card from a print shop, best with three to six. The grid spreads colors across the sheet, which is what most reviews look at. A4 reflows everything for a portrait page with larger blocks and wider cells, the one to pin next to a design or hand to whoever produces it.
Do not scale the page when printing. The A4 layout is already drawn at 1240 by 1754, and the browser fits it to the paper. Light and white swatches carry a faint outline on purpose: without it a white block on white paper has no edge.
A share link keeps the title, the hex values, the role names and the layout, up to 12 colors; anything beyond that is dropped. The hexes travel without the hash so the link stays short, and the page restores it on load, so the card still shows standard HEX.