How to add custom colors/attributes to the theme?

Previously: #317, #568, #799, but I don’t think the question has been answered:

What is the recommended way to pass custom attributes (eg. custom accent colors besides the one accent property) through the theme? The typescript type currently makes this inconvenient.

One way is to make a separate auxTheme object and pass it through a custom context, but it would be nicer to be able to use a single theme object.

Perhaps adding a auxiliary: any key to the theme type will be sufficient? Perhaps we can make Provider take a generic type for the auxiliary object, or infer it?

[kamui545]

Support has been merged (#2002) and it is now available on react-native-paper@^4.0.0-alpha.2, just tried it out and it works like a charm.

Usage:

declare global {
  namespace ReactNativePaper {
    interface ThemeColors {
      myOwnColor: string;
    }
    interface Theme {
      myOwnProperty: boolean;
    }
  }
}

[stearruda]

Is there any workaround with the ESLint rule over typescript-eslint/no-namespace?