Form constructor for testing #type 'color' elements.
form_test_color_submit()
function form_test_color($form, &$form_state) {
$form['#submit'] = array(
'_form_test_submit_values_json',
);
$form['color'] = array(
'#type' => 'color',
'#title' => 'Color',
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => 'Submit',
);
return $form;
}