oda-framework/tools/styles/theme-editor/themes/default.json

It's an ES Progressive Framework based on the technology of Web Components and designed especially for creating custom UI/UX of any complexity for web and cross-platform PWA mobile applications.

{
  "--content-background": "var(--content-background)",
  "--content-color": "var(--content-color)",
  "--header-background": "var(--content-color)"
}