The `@img/colour` package provides a CommonJS wrapper for the ESM-only `color` package, enabling compatibility with JavaScript runtimes that don't yet support ESM, such as Node.js versions prior to 20.19.0. It converts the `color` package and its dependencies (`color-convert`, `color-string`, and `color-name`) to CommonJS, making them usable in older environments. This project is ideal for developers working with legacy Node.js versions or other CommonJS-based systems who need access to the `color` package's functionality.