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diff --git a/src/ui/dialog/global-palettes.h b/src/ui/dialog/global-palettes.h
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+++ b/src/ui/dialog/global-palettes.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * @brief Global color palette information.
+ */
+/* Authors: PBS <pbs3141@gmail.com>
+ * Copyright (C) 2022 PBS
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_DIALOG_GLOBAL_PALETTES_H
+#define INKSCAPE_UI_DIALOG_GLOBAL_PALETTES_H
+
+#include <array>
+#include <vector>
+#include <glibmm/ustring.h>
+
+namespace Inkscape {
+namespace UI {
+namespace Dialog {
+
+/**
+ * The data loaded from a palette file.
+ */
+struct PaletteFileData
+{
+    /// Name of the palette, either specified in the file or taken from the filename.
+    Glib::ustring name;
+
+    /// The preferred number of columns (unused).
+    int columns;
+
+    /// Whether this is a user or system palette.
+    bool user;
+
+    struct Color
+    {
+        /// RGB color.
+        std::array<unsigned, 3> rgb;
+
+        /// Name of the color, either specified in the file or generated from the rgb.
+        Glib::ustring name;
+    };
+
+    /// The list of colors in the palette.
+    std::vector<Color> colors;
+
+    /// Load from the given file, throwing std::runtime_error on fail.
+    PaletteFileData(Glib::ustring const &path);
+};
+
+/**
+ * Singleton class that manages the static list of global palettes.
+ */
+class GlobalPalettes
+{
+    GlobalPalettes();
+public:
+    static GlobalPalettes const &get();
+    std::vector<PaletteFileData> palettes;
+};
+
+} // namespace Dialog
+} // namespace UI
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_DIALOG_GLOBAL_PALETTES_H