Is it possible to change the TextField's font color in material-ui-next?

I referred this page TextField API

And I override the TextField using Classes

const styles = theme => ({
    multilineColor:{
        color:'red'
    }
});

Apply the class to TextField using InputProps.

<TextField 
  className = "textfield"
  fullWidth
  multiline
  InputProps={{
    className: classes.multilineColor
  }}
  label   = "Debugger"
  rows    = "10"
  margin  = "normal" />

EDIT In older version you have to specify the key input

<TextField 
    className = "textfield"
    fullWidth
    multiline
    InputProps={{
        classes: {
            input: classes.multilineColor
        }
    }}
    label   = "Debugger"
    rows    = "10"
    margin  = "normal"
/>

Hope this will work.

How to set color property and background property of Text Field

import PropTypes from "prop-types";
import { withStyles } from "@material-ui/core/styles";
import TextField from "@material-ui/core/TextField";

const styles = {
  root: {
    background: "black"
  },
  input: {
    color: "white"
  }
};

function CustomizedInputs(props) {
  const { classes } = props;

  return (
    <TextField
      defaultValue="color"
      className={classes.root}
      InputProps={{
        className: classes.input
      }}
    />
  );
}

CustomizedInputs.propTypes = {
  classes: PropTypes.object.isRequired
};

export default withStyles(styles)(CustomizedInputs);