Six approved background values — three dark, three light. Never use an off-palette value as a page or card background.
Universal baseline: Systems Blue and Forged Steel are the only two colors approved across all audience contexts without restriction.
Core Deep
#0A0C10
Main UI Base
Industrial Surface
#121418
Component Backing
Data Midnight
#020617
High-Contrast Depth
Laboratory Clean
#F8FAFC
Main UI Base
Cold Slate
#F1F5F9
Component Backing
Neutral Ash
#E2E8F0
Structural Lines