Color.
One brand accent — deep jade. Warm-neutral surfaces. The marketing palette adds cobalt and yellow but never appears in product UI. Restraint is the brand.
The product palette and marketing palette do not mix. The product is restrained; the marketing is expressive. Both share jade as a connective thread.
Cream surface. Jade-deep ink. Jade brand accent. Hairline borders. No gradients, no shadows, no rounded corners. Architectural.
Cobalt foreground. Radial gradients. Yellow highlight. Vector-map and morse-code motifs. Reserved for decks, billboards, hero surfaces, the auth screen.
Use jade as the only accent in product UI. Cobalt and yellow are reserved for marketing surfaces.
Pair cream surfaces with deep-jade ink. Pair near-black surfaces with white ink.
Treat destructive as monochrome — black on light, white on dark. Restraint is the trust signal.
Don't mix product jade and marketing cobalt in the same surface — choose one register.
Don't use yellow as a background, button color, or for body text. Highlight only.
Don't reach for red destructive. The system is monochrome on purpose.