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diff --git a/offapi/com/sun/star/chart2/XColorScheme.idl b/offapi/com/sun/star/chart2/XColorScheme.idl
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef com_sun_star_chart2_XColorScheme_idl
+#define com_sun_star_chart2_XColorScheme_idl
+
+#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/util/Color.idl>
+
+module com
+{
+module sun
+{
+module star
+{
+module chart2
+{
+
+interface XColorScheme : ::com::sun::star::uno::XInterface
+{
+    /** returns the default color for the nth data series.
+
+        <p>This may be a system wide color or a color coming from a
+        color scheme.</p>
+
+        <p>Usually there exist a fixed number of default colors.  This
+        method should always return a valid Color.  If the index (i)
+        is higher than the number of default colors (n), the method
+        should return the modulus (i mod n), i.e., the colors should
+        repeat in a cyclic way.</p>
+
+        @param nIndex
+            The index of the series.  This is used to obtain the
+            correct default color.
+     */
+    ::com::sun::star::util::Color  getColorByIndex( [in] long nIndex );
+};
+
+} ; // chart2
+} ; // com
+} ; // sun
+} ; // star
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */