The Meridiant mark is a meridian sphere — a globe crossed by a meridian line, with the accent dot at 90°, the meridian's peak where the sun crosses. It signals orientation, precision, and a single defining line, echoing the protocol's isolated-market model and the degree scale used across meridiant.xyz.
Primary on light: ink strokes (#16181E) with the chartreuse accent dot. On dark: paper strokes (#F6F6F4), accent unchanged. Never recolor the strokes to the accent, and never fill the sphere.
Horizontal lockup is primary for headers and wide contexts. Stacked lockup with descriptor suits square and centered placements. Wordmark tracking is 0.14em (horizontal) / 0.20em (stacked).
Clearspace — keep free space of at least ½ the mark's height on all sides. Nothing (type, imagery, edges) intrudes into this zone.
Minimum size — mark: 20px / 6mm. Horizontal lockup: 120px / 32mm wide. Below these, switch to the app-icon tile, which keeps thicker strokes legible down to 16px.
Ink tile, paper mark, corner radius ≈ 22.6% of tile. At the smallest size the accent dot is dropped so the meridian reads cleanly. Provided as PNG 16–1024px.
Chartreuse is the single accent — use it sparingly, for the mark dot, key figures, and one live/status highlight per view. Ink and paper carry everything else. Muted grey is for labels, captions, and the degree scale.
Keep ink/paper strokes; accent only on the dot.
Preserve clearspace and the 0.14em wordmark tracking.
Use the app-icon tile below 20px.
Recolor the sphere, fill it, or add gradients.
Stretch, rotate, or reweight the strokes.
Place on busy imagery or low-contrast backgrounds.
SVG is the master format — scale infinitely. Use PNG (transparent) for screen/app, JPG (solid bg) where transparency is unsupported. Sizes are in px (width); "w" = white variant.
