diff --git a/lib/extensions/__init__.py b/lib/extensions/__init__.py
index 9a11e3bd8..64e6af02a 100644
--- a/lib/extensions/__init__.py
+++ b/lib/extensions/__init__.py
@@ -18,6 +18,7 @@ from .global_commands import GlobalCommands
 from .import_threadlist import ImportThreadlist
 from .input import Input
 from .install import Install
+from .install_custom_palette import InstallCustomPalette
 from .layer_commands import LayerCommands
 from .lettering import Lettering
 from .lettering_custom_font_dir import LetteringCustomFontDir
@@ -57,6 +58,7 @@ __all__ = extensions = [StitchPlanPreview,
                         Cleanup,
                         BreakApart,
                         ImportThreadlist,
+                        InstallCustomPalette,
                         Simulator,
                         Reorder,
                         DuplicateParams,
diff --git a/lib/extensions/install_custom_palette.py b/lib/extensions/install_custom_palette.py
new file mode 100644
index 000000000..da546cad8
--- /dev/null
+++ b/lib/extensions/install_custom_palette.py
@@ -0,0 +1,42 @@
+# Authors: see git history
+#
+# Copyright (c) 2021 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
+import os
+import shutil
+
+import inkex
+
+from ..i18n import _
+from ..utils import guess_inkscape_config_path
+from .base import InkstitchExtension
+
+
+class InstallCustomPalette(InkstitchExtension):
+    def __init__(self, *args, **kwargs):
+        InkstitchExtension.__init__(self, *args, **kwargs)
+        self.arg_parser.add_argument("-f", "--filepath", type=str, default="", dest="filepath")
+
+    def effect(self):
+        gpl = self.options.filepath
+        if not os.path.isfile(gpl):
+            inkex.errormsg(_("File does not exist."))
+
+        palette_name = os.path.basename(gpl)
+        if not palette_name.endswith('.gpl'):
+            inkex.errormsg(_("Wrong file type. Ink/Stitch only accepts gpl color palettes."))
+
+        if not palette_name.startswith('InkStitch'):
+            palette_name = 'InkStitch %s' % palette_name
+
+        palette_path = os.path.join(guess_inkscape_config_path(), 'palettes')
+
+        if not os.path.isdir(palette_path):
+            inkex.errormsg(_("Ink/Stitch cannot find your palette folder automatically. Please install your palette manually."))
+        dest = os.path.join(palette_path, palette_name)
+        shutil.copyfile(gpl,  dest)
+
+        if not os.path.isfile(dest):
+            inkex.errormsg("Something wwent wrong. Ink/Stitch wasn't able to copy your palette "
+                           "file into the Inkscape palettes folder. Please do it manually.")
diff --git a/templates/install_custom_palette.xml b/templates/install_custom_palette.xml
new file mode 100644
index 000000000..cb2865c70
--- /dev/null
+++ b/templates/install_custom_palette.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+    <name>{% trans %}Install custom palette{% endtrans %}</name>
+    <id>org.inkstitch.install_custom_palette.{{ locale }}</id>
+    <param name="extension" type="string" gui-hidden="true">install_custom_palette</param>
+    <label indent="1">{% trans %}Choose a .gpl color palette file to install into Inkscape.{% endtrans %}</label>
+    <label indent="1">{% trans %}Restart Inkscape to use.{% endtrans %}</label>
+    <param indent="1" name="filepath" type="path" gui-text="{{ _('Choose file') }}" mode="file" filetypes="gpl"/>
+    <effect needs-live-preview="false">
+        <object-type>all</object-type>
+        <effects-menu>
+            <submenu name="Ink/Stitch">
+                <submenu name="{% trans %}Thread Color Management{% endtrans %}" />
+            </submenu>
+        </effects-menu>
+    </effect>
+    <script>
+        {{ command_tag | safe }}
+    </script>
+</inkscape-extension>