onChangeCompleteHandler parameter is not typed

Hi,
I'm using this component in my React App with Typescript. The linter gives me an error saying the color parameter needs to have a type. I've tried `any `and `unknown `but it just gives one problem or the other. Appreciate it if there is a type for this.

```
const onChangeCompleteHandler = (color: unknown) => {
}
```

Start from the React component API and the onChangeCompleteHandler callback shown in the issue, then inspect how its color argument is exposed to TypeScript consumers. Verify the callback type in a small TypeScript usage example; done means the linter accepts the handler without any or unknown.

Written by the indexing model from the issue text.