C1 had the most robust silhouette of the seven and the least ownership: three bookmark ribbons is a shape any read-later app could reach for. Ownability is the thing to attack, so each variant below adds one specific idea — a rhythm, a structure, a colour rule — and the caption says whether it actually buys anything.
Shown in the app's own palette (navy / vermilion / yellow from Paper.swatchPairs) rather than the reference cyan-violet, since that was the conclusion of the last sheet. The ownable? line is the honest verdict, not a summary.
The three-swatch column is the interesting one. The app already hashes bookmarks into a twelve-swatch palette — a mark built from three of those swatches is describing the app's actual data model, which is ownership no competitor can copy without copying the system underneath it.
128 / 64 / 40 / 24 / 16 px. C1's whole argument is that it survives this; the developments have to survive it too or they've bought ownership with legibility.
Squircle at 118 and 58 px, mark at ~62% of the tile.
The test C1 is most likely to win: a repeating field is where a simple silhouette beats a clever one.