function acf_load_color_field_choices( $field ) {

    // reset choices

    $field['choices'] = array();

    // get the textarea value from options page without any formatting

    $choices = get_field('my_select_values', 'option', false);

​

    // explode the value so that each line is a new array piece

    $choices = explode("\n", $choices);

​

    // remove any unwanted white space

    $choices = array_map('trim', $choices);

​

    // loop through array and add to field 'choices'

    if( is_array($choices) ) {

        foreach( $choices as $choice ) {

            $field['choices'][ $choice ] = $choice;

        }

    }

​

    // return the field

    return $field;

}

​

add_filter('acf/load_field/name=color', 'acf_load_color_field_choices');