diff --git a/desktoptheme/shift-dark/solid/widgets/panel-background.svg b/desktoptheme/shift-dark/solid/widgets/panel-background.svg
new file mode 100644
index 00000000..c850f70e
--- /dev/null
+++ b/desktoptheme/shift-dark/solid/widgets/panel-background.svg
@@ -0,0 +1,23 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#2eb8a8" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" fill="#0e1118"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#0e1118"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#0e1118"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#0e1118"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#0e1118"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#0e1118"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#0e1118"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#0e1118"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#0e1118"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-center" x="12" y="12" width="40" height="40" fill="#0e1118"/>
+  <rect id="thick-hint-top-margin" x="30" y="0" width="4" height="12" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-hint-bottom-margin" x="30" y="52" width="4" height="12" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-hint-left-margin" x="0" y="30" width="12" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-hint-right-margin" x="52" y="30" width="12" height="4" fill="#2eb8a8" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/desktoptheme/shift-dark/widgets/background.svg b/desktoptheme/shift-dark/widgets/background.svg
new file mode 100644
index 00000000..7b98e4e0
--- /dev/null
+++ b/desktoptheme/shift-dark/widgets/background.svg
@@ -0,0 +1,22 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#2eb8a8" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" rx="3" fill="#171c29"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#171c29"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#171c29"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#171c29"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#171c29"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#171c29"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#171c29"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#171c29"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#171c29"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-top-inset" x="30" y="8" width="4" height="1" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-bottom-inset" x="30" y="55" width="4" height="1" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-left-inset" x="8" y="30" width="1" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-right-inset" x="55" y="30" width="1" height="4" fill="#2eb8a8" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/desktoptheme/shift-dark/widgets/panel-background.svg b/desktoptheme/shift-dark/widgets/panel-background.svg
new file mode 100644
index 00000000..9179c154
--- /dev/null
+++ b/desktoptheme/shift-dark/widgets/panel-background.svg
@@ -0,0 +1,33 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <style id="current-color-scheme" type="text/css">
+      .ColorScheme-Background { color: #0e1118; }
+      .ColorScheme-Highlight { color: #2eb8a8; }
+    </style>
+  </defs>
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#2eb8a8" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" rx="0" fill="#111622"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#111622"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#111622"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#111622"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#111622"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#111622"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#111622"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#111622"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#111622"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-top-inset" x="30" y="8" width="4" height="1" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-bottom-inset" x="30" y="55" width="4" height="1" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-left-inset" x="8" y="30" width="1" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-right-inset" x="55" y="30" width="1" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-center" x="12" y="12" width="40" height="40" fill="#111622"/>
+  <rect id="thick-hint-top-margin" x="30" y="0" width="4" height="12" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-hint-bottom-margin" x="30" y="52" width="4" height="12" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-hint-left-margin" x="0" y="30" width="12" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="thick-hint-right-margin" x="52" y="30" width="12" height="4" fill="#2eb8a8" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/desktoptheme/shift-dark/widgets/translucentbackground.svg b/desktoptheme/shift-dark/widgets/translucentbackground.svg
new file mode 100644
index 00000000..589e1f58
--- /dev/null
+++ b/desktoptheme/shift-dark/widgets/translucentbackground.svg
@@ -0,0 +1,18 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#2eb8a8" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" fill="#0e1118" opacity="0.72"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#0e1118" opacity="0.72"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#0e1118" opacity="0.72"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#0e1118" opacity="0.72"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#0e1118" opacity="0.72"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#0e1118" opacity="0.72"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#0e1118" opacity="0.72"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#0e1118" opacity="0.72"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#0e1118" opacity="0.72"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#2eb8a8" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/desktoptheme/shift-light/solid/widgets/panel-background.svg b/desktoptheme/shift-light/solid/widgets/panel-background.svg
new file mode 100644
index 00000000..5e384117
--- /dev/null
+++ b/desktoptheme/shift-light/solid/widgets/panel-background.svg
@@ -0,0 +1,23 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#0f766e" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" fill="#ffffff"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#ffffff"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#ffffff"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#ffffff"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#ffffff"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#ffffff"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#ffffff"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#ffffff"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#ffffff"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="thick-center" x="12" y="12" width="40" height="40" fill="#ffffff"/>
+  <rect id="thick-hint-top-margin" x="30" y="0" width="4" height="12" fill="#0f766e" opacity="0"/>
+  <rect id="thick-hint-bottom-margin" x="30" y="52" width="4" height="12" fill="#0f766e" opacity="0"/>
+  <rect id="thick-hint-left-margin" x="0" y="30" width="12" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="thick-hint-right-margin" x="52" y="30" width="12" height="4" fill="#0f766e" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/desktoptheme/shift-light/widgets/background.svg b/desktoptheme/shift-light/widgets/background.svg
new file mode 100644
index 00000000..0d0c494a
--- /dev/null
+++ b/desktoptheme/shift-light/widgets/background.svg
@@ -0,0 +1,22 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#0f766e" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" rx="3" fill="#ffffff"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#ffffff"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#ffffff"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#ffffff"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#ffffff"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#ffffff"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#ffffff"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#ffffff"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#ffffff"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-top-inset" x="30" y="8" width="4" height="1" fill="#0f766e" opacity="0"/>
+  <rect id="hint-bottom-inset" x="30" y="55" width="4" height="1" fill="#0f766e" opacity="0"/>
+  <rect id="hint-left-inset" x="8" y="30" width="1" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-right-inset" x="55" y="30" width="1" height="4" fill="#0f766e" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/desktoptheme/shift-light/widgets/panel-background.svg b/desktoptheme/shift-light/widgets/panel-background.svg
new file mode 100644
index 00000000..4136444f
--- /dev/null
+++ b/desktoptheme/shift-light/widgets/panel-background.svg
@@ -0,0 +1,27 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#0f766e" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" fill="#f6f8fb"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#f6f8fb"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#f6f8fb"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#f6f8fb"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#f6f8fb"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#f6f8fb"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#f6f8fb"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#f6f8fb"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#f6f8fb"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-top-inset" x="30" y="8" width="4" height="1" fill="#0f766e" opacity="0"/>
+  <rect id="hint-bottom-inset" x="30" y="55" width="4" height="1" fill="#0f766e" opacity="0"/>
+  <rect id="hint-left-inset" x="8" y="30" width="1" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-right-inset" x="55" y="30" width="1" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="thick-center" x="12" y="12" width="40" height="40" fill="#f6f8fb"/>
+  <rect id="thick-hint-top-margin" x="30" y="0" width="4" height="12" fill="#0f766e" opacity="0"/>
+  <rect id="thick-hint-bottom-margin" x="30" y="52" width="4" height="12" fill="#0f766e" opacity="0"/>
+  <rect id="thick-hint-left-margin" x="0" y="30" width="12" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="thick-hint-right-margin" x="52" y="30" width="12" height="4" fill="#0f766e" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/desktoptheme/shift-light/widgets/translucentbackground.svg b/desktoptheme/shift-light/widgets/translucentbackground.svg
new file mode 100644
index 00000000..661627ad
--- /dev/null
+++ b/desktoptheme/shift-light/widgets/translucentbackground.svg
@@ -0,0 +1,18 @@
+<!-- SPDX-FileCopyrightText: 2026 Marco Allegretti -->
+<!-- SPDX-License-Identifier: EUPL-1.2 -->
+<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
+  <rect id="hint-tile-center" x="0" y="0" width="2" height="2" fill="#0f766e" opacity="0"/>
+  <rect id="center" x="8" y="8" width="48" height="48" fill="#ffffff" opacity="0.78"/>
+  <rect id="top" x="8" y="0" width="48" height="8" fill="#ffffff" opacity="0.78"/>
+  <rect id="bottom" x="8" y="56" width="48" height="8" fill="#ffffff" opacity="0.78"/>
+  <rect id="left" x="0" y="8" width="8" height="48" fill="#ffffff" opacity="0.78"/>
+  <rect id="right" x="56" y="8" width="8" height="48" fill="#ffffff" opacity="0.78"/>
+  <rect id="topleft" x="0" y="0" width="8" height="8" fill="#ffffff" opacity="0.78"/>
+  <rect id="topright" x="56" y="0" width="8" height="8" fill="#ffffff" opacity="0.78"/>
+  <rect id="bottomleft" x="0" y="56" width="8" height="8" fill="#ffffff" opacity="0.78"/>
+  <rect id="bottomright" x="56" y="56" width="8" height="8" fill="#ffffff" opacity="0.78"/>
+  <rect id="hint-top-margin" x="30" y="0" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-bottom-margin" x="30" y="56" width="4" height="8" fill="#0f766e" opacity="0"/>
+  <rect id="hint-left-margin" x="0" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+  <rect id="hint-right-margin" x="56" y="30" width="8" height="4" fill="#0f766e" opacity="0"/>
+</svg>
\ No newline at end of file
diff --git a/tests/check-shift-theme-identity.sh b/tests/check-shift-theme-identity.sh
index ed82bc76..c78763ee 100644
--- a/tests/check-shift-theme-identity.sh
+++ b/tests/check-shift-theme-identity.sh
@@ -65,6 +65,22 @@ require_line desktoptheme/shift-light/metadata.json '"Name": "SHIFT Light"' \
 require_line cursors/shift-cursors/index.theme '^Name=SHIFT$' \
     "cursor theme visible name must be SHIFT"
 
+for desktop_asset in \
+    desktoptheme/shift-dark/widgets/panel-background.svg \
+    desktoptheme/shift-dark/solid/widgets/panel-background.svg \
+    desktoptheme/shift-dark/widgets/background.svg \
+    desktoptheme/shift-dark/widgets/translucentbackground.svg \
+    desktoptheme/shift-light/widgets/panel-background.svg \
+    desktoptheme/shift-light/solid/widgets/panel-background.svg \
+    desktoptheme/shift-light/widgets/background.svg \
+    desktoptheme/shift-light/widgets/translucentbackground.svg; do
+    [[ -f "$desktop_asset" ]] || fail "Shift desktop theme must provide $desktop_asset"
+    require_line "$desktop_asset" 'SPDX-FileCopyrightText: 2026 Marco Allegretti' \
+        "$desktop_asset must attribute Shift-owned work to Marco Allegretti"
+    require_line "$desktop_asset" 'SPDX-License-Identifier: EUPL-1\.2' \
+        "$desktop_asset must use EUPL-1.2"
+done
+
 require_line lookandfeel/contents/defaults '^ColorScheme=ShiftDark$' \
     "look-and-feel defaults must select ShiftDark"
 require_line lookandfeel/contents/defaults '^Theme=org\.shift\.icons$' \