navs add different color

https://github.com/almasaeed2010/AdminLTE/issues/429

build/less/navs.less

@@ -166,6 +166,49 @@
       color: #999;
     }
   }
+    // Tab color variations
+  &.tab-primary {
+    > .nav-tabs {
+      > li.active {
+        border-top-color: @light-blue;
+      }
+    }
+  }
+  &.tab-info {
+    > .nav-tabs {
+      > li.active {
+        border-top-color: @aqua;
+      }
+    }
+  }
+  &.tab-danger {
+    > .nav-tabs {
+      > li.active {
+        border-top-color: @red;
+      }
+    }
+  }
+  &.tab-warning {
+    > .nav-tabs {
+      > li.active {
+        border-top-color: @yellow;
+      }
+    }
+  }
+  &.tab-success {
+    > .nav-tabs {
+      > li.active {
+        border-top-color: @green;
+      }
+    }
+  }
+  &.tab-default {
+    > .nav-tabs {
+      > li.active {
+        border-top-color: @gray;
+      }
+    }
+  }
 }
 
 /* PAGINATION */
@@ -179,4 +222,4 @@
       .border-radius(0)!important;
     }
   }
-}
+}