diff --git a/modules/graphics/src/main/java/com/sun/javafx/css/converters/URLConverter.java b/modules/graphics/src/main/java/com/sun/javafx/css/converters/URLConverter.java
--- a/modules/graphics/src/main/java/com/sun/javafx/css/converters/URLConverter.java
+++ b/modules/graphics/src/main/java/com/sun/javafx/css/converters/URLConverter.java
@@ -114,20 +114,22 @@
             final String stylesheetPath = (stylesheetUrl != null) ?  stylesheetUrl.trim() : null;
 
             if (stylesheetPath != null && stylesheetPath.isEmpty() == false) {
-
                 URI stylesheetUri = new URI(stylesheetPath);
 
-                if (stylesheetUri.isOpaque() == false) {
-
+                if (stylesheetUri.isOpaque()) {
+                    // stylesheet URI is something like jar:file:
+                    // if the path starts with '/', then it will resolve relative to the root of the jar file.
+                    // If stylesheetUri is "jar:file://foo/bar.jar!/com/wickedcool/ui/styles.css"
+                    // and the resourceUri is "/shared/resources/image.png",
+                    // then new URL("jar:file://foo/bar.jar!/com/wickedcool/ui/styles.css", "/shared/resources/image.png")
+                    // will be "jar:file://foo/bar.jar!/shared/resources/image.png"
+                    URL url = stylesheetUri.toURL();
+                    return new URL(url, resourceUri.getPath());
+                } else if (!resourceUri.getPath().startsWith("/")) {
+                    // if path starts with '/', then the path is considered relative to the class-path
+                    // and the URL is resolved with the ClassLoader getResource() call below.
                     URI resolved = stylesheetUri.resolve(resourceUri);
                     return resolved.toURL();
-
-                } else {
-
-                    // stylesheet URI is something like jar:file:
-                    URL url = stylesheetUri.toURL();
-                    final String path = resourceUri.getPath();
-                    return new URL(url, resourceUri.getPath());
                 }
             }