&.{target}-{color}-accent-{1to4}<br /> <h2><i class="icon icon-warning"></i> Side note(s)</h2> You can define a color anywhere, like so: <?php echo htmlspecialchars('<div class="bg-cyan"><div class="child"></div></div>'); ?> , then add class ".bg-cyan-minus-3" on .child to make it brighter <div class="spacer"></div> </div> <div class="ws-4"></div> </div> </div> <?php $colors = array('red', 'pink', 'purple', 'deep-purple', 'indigo', 'blue', 'light-blue', 'cyan', 'teal', 'green', 'light-green', 'lime', 'yellow', 'amber', 'orange', 'deep-orange', 'brown', 'grey', 'blue-grey'); $colors = Colors::getAll(); $steps = Colors::getSteps(true); ?> <div class="crow fly no-gutter"> <?php $i = 0; foreach ($colors as $color => $data) { if ($i != 0 && $i % 4 == 0) { echo '</div><div class="crow fly no-gutter">'; } ?> <div class="bg-<?php echo $color; ?> tile">