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Renzo Beux
f718240ffc
Four tones cannot keep a twenty-stop trip's legs apart, which is most of the point of colour-coding one. A contribution can now carry `#rrggbb` alongside `tone`, per region or as a shorthand. The split of control is: the plugin picks the hue, the host picks the weight. A colour rides the same per-theme, per-region alphas as a tone, and its OKLCH lightness is clamped into a per-theme band first, so no contribution can hand a user a day card they can't read. The band brackets the built-in tones rather than tightening around them, so an ordinary colour passes through untouched and a hex equal to a tone renders exactly like that tone. Hue and chroma are never touched - it bounds a colour, it doesn't boost one, so a near-white grey still lands as a faint tint. Only `#rrggbb` survives normalization, and that is a security boundary rather than tidying: the value ends up inside a `color-mix()` in an inline `background`, a shorthand that takes a layer list, so a string closing the paren early could append a `url(...)` and beacon everyone viewing the trip. A region gets exactly one paint instruction - what it names beats the shorthand, a colour beats a tone at the same level - so the client never has a tie to break. A region naming a colour the host can't use degrades to `default` like a bogus tone already did.