Purple and violet as the unspecified default
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Rule · bucket: hybrid · severity: warning · detector: violet-band-hue · since: v0.1.0
Section: Things to avoid
Group: Generic-AI aesthetic

Forbidden:
  A violet or indigo fill, or a violet→pink gradient, chosen because no colour was specified

Instead:
  Use `--color-brand` from the brand file. The unbranded default resolves it to near-black, which ships a coherent monochrome UI and makes the missing decision visible. Then ask.

**Being asked to propose a colour does not discharge this.** A proposal is a question with a suggested answer, not a decision — so suggest one freely when asked, but ship the unbranded default alongside it and leave the brand file unchanged until a human confirms. Two agents given the same brief split on exactly this point, one deferring and one treating its own proposal as the answer, and both cited the same conflict-resolution clause to get there. The task can ask you for a recommendation; it cannot make you the one who decided.