マリン：ルールとシグナル

Why this icon holds up

On 2026-08-13 the vault captured the マリン：ルールとシグナル icon (Navigation, BR): 白色背景，上方有蓝色色块和文字，下方是蓝色海面，左侧有一艘白色帆船，右侧有一艘灰色轮船。

No earlier vault capture exists yet, so this dated page is the baseline for future diffs.

Tagged as photographic · neutral.

Small-size readability

• Contrast: gray mark on white fill — check both dim OLED and bright LCD.
• Silhouette budget: sailboat, ship, smoke, sea should remain readable after the store’s rounded-square crop.
• Lettering “Imray” must survive home-screen size; thin strokes usually fail first.
• detailed/illustration/photo detail collapses quickly below ~60px — verify the 60px mental model before trusting the master.
• Internal usability score for this capture: 0.6/100 (heuristic, not a store ranking).

These checks are practical references for designers reviewing マリン：ルールとシグナル, not authoritative store scores.

Transferable design moves

• Keep sailboat as the primary silhouette before adding secondary ornaments.
• Concentrate the loudest chroma on the identifying shape (gray), not the whole white field.
• This capture’s detailed/illustration/photo vocabulary transfers best when the same restraint is applied at export size.