--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/awt/ColorClass/OpacityChange/OpacityChange.java	Tue Oct 15 22:42:23 2019 -0700
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+  @test
+  @bug 6783910
+  @summary java.awt.Color.brighter()/darker() methods make color opaque
+  @author Andrei Dmitriev: area=awt-color
+  @run main OpacityChange
+*/
+
+import java.awt.*;
+
+public class OpacityChange {
+    private final static int INITIAL_ALPHA = 125;
+
+    public static void main(String argv[]) {
+        Color color = new Color(20, 20, 20, INITIAL_ALPHA);
+        System.out.println("Initial alpha: " + color.getAlpha());
+        Color colorBrighter = color.brighter();
+        System.out.println("New alpha (after brighter): " + colorBrighter.getAlpha());
+
+        Color colorDarker = color.darker();
+        System.out.println("New alpha (after darker): " + colorDarker.getAlpha());
+
+
+        if (INITIAL_ALPHA != colorBrighter.getAlpha()) {
+            throw new RuntimeException("Brighter color alpha has changed from : " +INITIAL_ALPHA + " to " + colorBrighter.getAlpha());
+        }
+        if (INITIAL_ALPHA != colorDarker.getAlpha()) {
+            throw new RuntimeException("Darker color alpha has changed from : " +INITIAL_ALPHA + " to " + colorDarker.getAlpha());
+        }
+    }
+}