compass-showcase.css

.greenButton {
  background-image: url('data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4gPHN2ZyB2ZXJzaW9uPSIxLjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGRlZnM+PGxpbmVhckdyYWRpZW50IGlkPSJncmFkIiBncmFkaWVudFVuaXRzPSJvYmplY3RCb3VuZGluZ0JveCIgeDE9IjAuMCIgeTE9IjAuMCIgeDI9IjEuMCIgeTI9IjEuMCI+PHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iIzMzZmY5OSIvPjxzdG9wIG9mZnNldD0iMTAwJSIgc3RvcC1jb2xvcj0iIzAwY2M2NiIvPjwvbGluZWFyR3JhZGllbnQ+PC9kZWZzPjxyZWN0IHg9IjAiIHk9IjAiIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbGw9InVybCgjZ3JhZCkiIC8+PC9zdmc+IA==');
  background-size: 100%;
  background-image: -webkit-gradient(linear, 0% 0%, 100% 100%, color-stop(0%, #33ff99), color-stop(100%, #00cc66));
  background-image: -moz-linear-gradient(top, #33ff99, #00cc66);
  background-image: -webkit-linear-gradient(top, #33ff99, #00cc66);
  background-image: linear-gradient(to bottom right, #33ff99, #00cc66);
  color: white;
}

.greenButton:hover {
  background-image: url('data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4gPHN2ZyB2ZXJzaW9uPSIxLjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGRlZnM+PGxpbmVhckdyYWRpZW50IGlkPSJncmFkIiBncmFkaWVudFVuaXRzPSJvYmplY3RCb3VuZGluZ0JveCIgeDE9IjAuMCIgeTE9IjAuMCIgeDI9IjEuMCIgeTI9IjEuMCI+PHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iI2ZmZmZmZiIvPjxzdG9wIG9mZnNldD0iMTAwJSIgc3RvcC1jb2xvcj0iI2U2ZTZlNiIvPjwvbGluZWFyR3JhZGllbnQ+PC9kZWZzPjxyZWN0IHg9IjAiIHk9IjAiIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbGw9InVybCgjZ3JhZCkiIC8+PC9zdmc+IA==');
  background-size: 100%;
  background-image: -webkit-gradient(linear, 0% 0%, 100% 100%, color-stop(0%, #ffffff), color-stop(100%, #e6e6e6));
  background-image: -moz-linear-gradient(top, #ffffff, #e6e6e6);
  background-image: -webkit-linear-gradient(top, #ffffff, #e6e6e6);
  background-image: linear-gradient(to bottom right, #ffffff, #e6e6e6);
  color: #00ff80;
}