$gray-base:              #000;
$gray-darker:            lighten($gray-base, 10%);
$gray-dark:              lighten($gray-base, 30%);
$gray:                   lighten($gray-base, 50%);
$gray-light:             lighten($gray-base, 70%);
$gray-lighter:           lighten($gray-base, 90%);

$success:                green;
$pass:                   $success;
$warning:                orangered;
$error:                  red;