Sender names over the terrain step to the state's ink: same OKLCH hue and chroma, darker by day and dusk, lighter at night, until 4.5:1 on the lightest measured terrain patch (capped at OKLCH L 0.9 at night). Sidebar labels get a darker dusk ink on phones. An explicit theme still wins. The unread divider keeps only its green line.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>