Open

<div id="colorpicker"></div>
<script>
$("#colorpicker").kendoColorPicker({
  open: function() {
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log("Picker popup opened");
  }
});
</script>

<div id="colorpicker"></div>
<script>
function picker_open() {
/* The result can be observed in the DevTools(F12) console of the browser. */
  console.log("Picker popup opened");
}
$("#colorpicker").kendoColorPicker();
var colorpicker = $("#colorpicker").data("kendoColorPicker");
colorpicker.bind("open", picker_open);
</script>