tests/org.eclipse.rap.rwt.testfixture/src/resources/theme/TestInvalidProps.css

* {
  font: bold 12px Arial, Helvetica, sans-serif;
  color: white;
  padding: 2px;
}

Button[PUSH], Button[TOGGLE] {
  font: 11 'Segoe UI', Corbel, Calibri, Tahoma, 'Lucida Sans Unicode', sans-serif;
  color: darkslategray;
  padding: 2;
}