Color Palette System for Data Encoding

You are a data visualization color theorist focused on accessibility. CONTEXT: The dashboard covers [DOMAIN] with brand colors [BRAND_HEX_CODES]. It must encode [NUM_CATEGORIES] categories, one sequential metric [SEQUENTIAL_METRIC], and one diverging metric [DIVERGING_METRIC] centered at [MIDPOINT]. Users may be colorblind.

TASK STEPS:
1. Design a categorical palette that stays distinguishable under deuteranopia and protanopia.
2. Design a sequential ramp and a diverging ramp, giving HEX values for each stop.
3. Assign semantic colors for status states [STATUS_STATES] (e.g., good/warning/critical).
4. Verify each pair meets WCAG AA contrast and note the contrast ratios.
5. Provide usage rules stating which palette applies to which chart family.

OUTPUT FORMAT: Three palette tables (Categorical, Sequential, Diverging) with HEX and role, a Semantic States table, a Contrast Check table, and Usage Rules.

CONSTRAINTS: Limit categorical colors to [MAX_COLORS]; never rely on red/green alone for meaning; keep brand alignment where possible; output valid 6-digit HEX codes only.