On a tab, the industry colour is the field. On a page, the industry colour is the ink.
Same geometry, same proportions, two fills. This is the rule most often broken, so it is stated flatly: a favicon is a solid block of colour because solid blocks read at 16 px in a crowded tab bar. An in-page logo is never a solid block, because a filled block shouts on a quiet page.
Favicon / app icon modeRounded square filled solid in the industry accent. Frame, I and underscore knocked out of it. Bold on purpose.
In-page / on-text modeWhite background, no filled block. The frame stroke, the I and the underscore are drawn in the industry accent.
| Favicon / app icon | In-page / on-text |
| Background | Solid rounded square in the accent | White — no block, no fill |
| Glyph | Knocked out in white — always | Drawn in the accent itself |
| Corner radius | 22% of the icon width | Frame radius only |
| Why | Must win against 20 other tabs | Must sit quietly inside a document |
The glyph is always white. On every favicon, in every industry, the frame, the I and the underscore knock out in white — no exceptions. This keeps the family instantly recognisable across all six accents. Lighter accents like Rose and Gold trade some contrast for that consistency, which is a deliberate brand decision; any future accent should be dark enough to carry white comfortably.