Official interface theme

SentinelOS dark/cyan web standard.

The online platform uses a professional dark foundation with Sentinel cyan as the single interface accent. Official logos may retain their own artwork, but page chrome, cards, badges, menus, and workflow states should remain dark/cyan.

Theme boundary: the UI theme is dark/cyan. The SentinelOS and AEGIS logos remain official brand assets, but the surrounding website interface should not introduce unrelated accent systems.

Palette

Core tokens

Background#03070c

Primary page shell and deep backdrop.

Panel#07111a

Cards, dropdowns, panels, and page blocks.

Sentinel cyan#03c8ff

Links, badges, active states, and validation marks.

Text#effbff

Primary readable foreground on dark surfaces.

Use cyan for state

Navigation active states, focus rings, buttons, pills, step numbers, and verification highlights should use Sentinel cyan.

Keep surfaces restrained

Backgrounds should stay graphite, charcoal, and deep blue-black. Avoid bright panels or opaque blocks that fight the logo artwork.

Preserve local-first tone

The visual style should feel like a technical trust centre: clear, stable, inspectable, and not like a cloud SaaS dashboard.

Implementation rule

Dark by default. Cyan for intent.

The official web presentation should remain consistent across pages and future releases. Any extra colour should be justified by brand artwork or a specific status requirement, not used as general interface decoration.

Theme rule:
- dark shell
- cyan accent
- high contrast text
- restrained cards
- no unrelated UI accent system