如何更改react-bootstrap navbar-toggler-icon按钮和按钮颜色

import { Navbar, Nav, NavDropdown, Form, FormControl, Button } from 'react-bootstrap';

<Navbar bg="light" expand="lg">
  <Navbar.Brand href="#home">Logo</Navbar.Brand>
  <Navbar.Toggle aria-controls="basic-navbar-nav" />
  <Navbar.Collapse id="basic-navbar-nav">
    <Nav className="mr-auto">
      <Nav.Link href="#home">Home</Nav.Link>
      <Nav.Link href="#link">Link</Nav.Link>
      <NavDropdown title="Dropdown" id="basic-nav-dropdown">
        <NavDropdown.Item href="#action/3.1">Action</NavDropdown.Item>
        <NavDropdown.Item href="#action/3.2">Another action</NavDropdown.Item>
        <NavDropdown.Item href="#action/3.3">Something</NavDropdown.Item>
        <NavDropdown.Divider />
        <NavDropdown.Item href="#action/3.4">Separated link</NavDropdown.Item>
      </NavDropdown>
    </Nav>
    <Form inline>
      <FormControl type="text" placeholder="Search" className="mr-sm-2" />
      <Button variant="outline-success">Search</Button>
    </Form>
  </Navbar.Collapse>
</Navbar>

import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { faBars } from '@fortawesome/free-solid-svg-icons';

<Navbar.Toggle aria-controls="basic-navbar-nav">
  <FontAwesomeIcon icon={faBars} />
</Navbar.Toggle>

.custom-toggler-icon {
  color: red;
}

<Navbar.Toggle aria-controls="basic-navbar-nav" className="custom-toggler-icon" />