Fix for SASS asset precompilation issue in core-admin bootstrap theme

variables.scss

$header-gradient-top: #fdfdfd;
$header-gradient-bottom: #eaeaea;

//every color array has the base color class name in the left, and the actual color on the right
$triangleColors: red #aa433a, green #8fae53, blue #7fb3d4, orange #CF6E20;
$buttonColors:
  'default'   $header-gradient-top,
  'red'       #c57979,
  'green'     #96c161,
  'blue'      #5ba5cb,
  'gray'      #8c97a6,
  'black'     #838383,
  'lightblue' #6db5d5,
  'gold'      #d5a44c,
  'sea'       #5a837e,
  'brown'     #bb934f,
  'twitter'   lighten(#4099ff, 10),
  'facebook'  (lighten(#35508F, 10));


$news-colors: blue #7FB3D4, green #8CC079, cyan #81BABD, purple #AEA7CF;
$barColors:  green #97af32, blue darken(#9bcff5, 10), orange #d28346, black #4c4c4c, red #c8514e;
$sideColors: green #83DA05, red #E15307, orange #EF8132;
$numeric-stats-colors: blue #6e97aa, red #ba6d6d, green #8fae53;
$badge-colors: blue #7FB3D4, gray #767676, green #8CC079, red #b35d5d, dark-red #b5473e, black #666, cyan #81BABD, purple #AEA7CF;
$primary-sidebar-width: 200px;

//top header height (above breadcrumbs)
$breadcrumbs-header-height: 60px;

$box-background: #fbfbfb;
$box-border-color: #cdcdcd;
$box-header-text-color: #636363;

$header-height: 37px;

$avatar-border-color: #328194;

$link-color: #78808a;
$link-hover-color: #5a6573;

$chart-red: #C75D5D;
$chart-blue: #6e97aa;
$chart-orange: #ff9f01;
$chart-gray: #6B787F;
$chart-lightBlue: #D4E5DE;
$chart-green: #8FAE53;
$chart-dark-green: #779148;