MaterialUI - Changing the color Textfield on focus

Question

I'm trying to change the color of the label text in Textfield but I can't seem to figure it out.

Here is what I'm trying:

<TextField
    value={value}
    key={name}
    label={label}
    id={id}
    name={name}
    InputLabelProps={{
      shrink: true,
      FormLabelClasses: {
        'root': {
          '&:focused': {
            color: 'white'
          }
        },
        focused: 'true'
      }
    }}
  />

Can someone give me a pointer on what I'm doing wrong here?

I've also tried using the MuiThemeProvider but can't seem to figure that one out either:

const theme = createMuiTheme({
  overrides: {
    MuiFormLabel: {
      focused: true,
      root: {
        '&.focused': {
          color: 'white'
        }
      }
    }
  }
});

How can I change the color of the Label? In this photo, I want the "Notes" to match the color of the underline

Thanks for your help!

Answer 1

Tim! Here is the snippet that should help you.

const {
  TextField,
  createMuiTheme,
  MuiThemeProvider,
  CssBaseline,
} = window['material-ui'];

const theme = createMuiTheme({
  overrides: {
    MuiFormLabel: {
      root: {
        "&$focused": {
          color: "tomato",
          fontWeight: "bold"
        }
      }, 
      
      focused: {}
    }
  }
});

class Index extends React.Component {  
  render() {
    return (
      <MuiThemeProvider theme={theme}>
        <div>
          <CssBaseline />
          <TextField label="Text field" InputLabelProps={{shrink:true}} />
        </div>
      </MuiThemeProvider>
    );
  }
}

ReactDOM.render(<Index />, document.getElementById('root'));

    <script src="https://unpkg.com/react@latest/umd/react.development.js" crossorigin="anonymous"></script>
    <script src="https://unpkg.com/react-dom@latest/umd/react-dom.development.js" crossorigin="anonymous"></script>
    <script src="https://unpkg.com/@material-ui/core/umd/material-ui.development.js" crossorigin="anonymous"></script>

<div id="root"></div>

Answer 2

Another way of doing it without the override is to have:

const textStyles = makeStyles({
  root: {
    "& .Mui-focused": {
      color: "tomato", 
      fontWeight: "bold"
    },
});

class Index extends React.Component {  
  const TextClass = textStyles()
  render() {
    return (
      <MuiThemeProvider theme={theme}>
        <div>
          <CssBaseline />
          <TextField className={textStyles.root} label="Text field" InputLabelProps={{shrink:true}} />
        </div>
      </MuiThemeProvider>
    );
  }
}