How to change the color of the placeholder text using react-bootstrap-typeahead?

Using react-bootstrap-typeahead there is an option to provide placeholder text.

How can I change the color of this text? I can't find the relevant selector to target the placeholder text element on the demo page:

https://stackoverflow.com/questions/65855040/how-to-change-the-color-of-the-placeholder-text-using-react-bootstrap-typeahead January 23, 2021 at 10:07AM