The tile is #0047A0 in both modes. Only the wordmark inverts. DdsBrand.blue is a BRAND token, not a UI token — unlike the UI accent it has no dark-mode variant, does not invert and does not go monochrome. It stays legible on the dark background because the white glyph sits on a filled tile rather than beside it, which is the whole reason the mark is a tile and not a bare letter. logo_test.dart asserts the mark reads the brand token and not the UI accent. §10.