Updating design of OHIF Viewer using (OHIF-49)

Packages/viewerbase/client/components/viewer/loadingIndicator/loadingIndicator.styl

@@ -1,6 +1,8 @@
+@import "{design}/app.styl"
+
 .imageViewerLoadingIndicator
   display: none
-  color: #ffa500
+  color: $textPrimaryColor
 
 .faded
   opacity: 0.5
@@ -11,7 +13,7 @@
   
   p, h4
     text-align: center
-    color: #ffa500
+    color: $textColorActive
     padding: 4px 0px
     
   p