     <input type="text" class="span3" placeholder="lighten(@navbarBackground, 25%)">
                <label>@navbarSearchBackgroundFocus</label>
                <input type="text" class="span3" placeholder="@white">
                <label>@navbarSearchBorder</label>
                <input type="text" class="span3" placeholder="darken(@navbarSearchBackground, 30%)">
                <label>@navbarSearchPlaceholderColor</label>
                <input type="text" class="span3" placeholder="#ccc">

             