Issue #3349299 by dqd: Make crop area more distinctive for transparent images

css/image_widget_crop.css

@@ -59,13 +59,14 @@
   bottom: -1px;
 }
 
-/* Crop canvas */
+/* Make crop area more distinctive for transparent images on wrap box */
 .cropper-container .cropper-wrap-box .cropper-canvas {
-  outline: 2px dashed #0000FFFF;
+  outline: 2px dashed #0099ff;
 }
 
+/* Make crop area more distinctive for transparent images on crop box */
 .cropper-container  .cropper-crop-box {
-  background-color: white;
+  background-color: #ffffff;
 }
 
 @media screen and (max-width: 480px) {