content: import React from 'react';
  import ReactDOM from 'react-dom';
  import App from './App';
  import CssBaseline from "@material-ui/core/CssBaseline";
  import { unstable_createMuiStrictModeTheme as createMuiTheme } from '@material-ui/core';
  import { ThemeProvider } from '@material-ui/core/styles';
  
  const theme = createMuiTheme({
    palette: {
      type: "dark",
      primary: {
        main: "#1f4068"
      },
      secondary: {
        main: "#e43f5a"
      }
      //error:
      //warning:
      //info:
      //success:
    }
  });
  
  ReactDOM.render(
    <React.StrictMode>
      <ThemeProvider theme={theme}>
        <CssBaseline />
          <App />
      </ThemeProvider>
    </React.StrictMode>,
    document.getElementById('root')
  );
  
  // If you want to start measuring performance in your app, pass a function
  // to log results (for example: reportWebVitals(console.log))
  // or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
  //reportWebVitals(console.log);
  