$wysiwygConfig = function ( $wysiwyg_config ) {
/**
* You can find a list of all available plugins as folder names
* in wp-includes/js/tinymce/plugins
*/
$plugins         = array(
'colorpicker',
'textcolor',
);
$toolbar_buttons = array(
'|',
'fontsizeselect',
'|',
'forecolor',
'backcolor'
);

$wysiwyg_config['tinymce']['plugins']  .= ',' . implode( ',', $plugins );
$wysiwyg_config['tinymce']['toolbar1'] .= ',' . implode( ',', $toolbar_buttons );
$wysiwyg_config['media_buttons']       = true;

return $wysiwyg_config;
};

// for JetFormBuilder
add_filter( 'jet-form-builder/fields/wysiwyg-field/config', $wysiwygConfig );