title: How to customize text colors in the material ui in v 1.0.0
body: <p>Hello I try to customize the primary text-colors of the material ui,</p>
  
  <p>I did this to customize the primary color:</p>
  
  <pre><code>const blue = {
    50: '#3ea5d7',
    100: '#3ea5d7',
    200: '#3ea5d7',
    300: '#3ea5d7',
    400: '#3ea5d7',
    500: '#3ea5d7',
    600: '#3ea5d7',
    700: '#3ea5d7',
    800: '#3ea5d7',
    900: '#3ea5d7',
    A100: '#3ea5d7',
    A200: '#3ea5d7',
    A400: '#3ea5d7',
    A700: '#3ea5d7',
    contrastDefaultColor: 'light',
  };
  
  const muiTheme = createMuiTheme({
    palette: {
      primary: blue,
    },
  </code></pre>
  
  <p>but I didnt get it how to customize the Text color. How to do this?</p>