Add field in administration and after that edit templates\bootstrap2-responsive\property.php, lines around 328-340 add red customization for outdoor amenities example:

                <?php if(isset($category_options_52) && $category_options_count_52>0): ?>
                <h2>{options_name_52}</h2>
                <ul class="amenities">
                {category_options_52}
                {is_checkbox}
                <li>
                <img src="assets/img/checkbox_{option_value}.png" alt="{option_value}" class="check" />&nbsp;&nbsp;{option_name}&nbsp;&nbsp;{icon}
                </li>
                {/is_checkbox}
                {is_dropdown}
                <li>
{option_name}: {option_value}
                </li>
                {/is_dropdown}
                {/category_options_52}
                </ul>
                <br style="clear: both;" />
                <?php endif; ?>