diff --git a/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/chrome.css b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/chrome.css
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+++ b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/chrome.css
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+
+/* Glance Button Colors
+ * Customize Zen's floating Glance button colors.
+ */
+
+.zen-glance-sidebar-container toolbarbutton {
+  background: var(--theme-glance_button_colors-button_background, #181818) !important;
+  color: var(--theme-glance_button_colors-icon_color, #ffffff) !important;
+  fill: var(--theme-glance_button_colors-icon_color, #ffffff) !important;
+  stroke: var(--theme-glance_button_colors-icon_color, #ffffff) !important;
+
+opacity: var(--theme-glance_button_colors-button_opacity, 1) !important;
+
+border: var(--theme-glance_button_colors-button_border, none) !important;
+  box-shadow: var(--theme-glance_button_colors-button_shadow, none) !important;
+
+-moz-context-properties: fill, fill-opacity, stroke, stroke-opacity !important;
+}
+
+.zen-glance-sidebar-container toolbarbutton:hover {
+  background: var(--theme-glance_button_colors-button_hover_background, #2c2c2c) !important;
+}
+
+.zen-glance-sidebar-container toolbarbutton .toolbarbutton-icon {
+  color: var(--theme-glance_button_colors-icon_color, #ffffff) !important;
+  fill: var(--theme-glance_button_colors-icon_color, #ffffff) !important;
+  stroke: var(--theme-glance_button_colors-icon_color, #ffffff) !important;
+  filter: none !important;
+
+-moz-context-properties: fill, fill-opacity, stroke, stroke-opacity !important;
+}
diff --git a/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/image.png b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/image.png
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diff --git a/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/preferences.json b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/preferences.json
new file mode 100644
index 000000000..6fcddff47
--- /dev/null
+++ b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/preferences.json
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+[
+    {
+        "property": "theme-glance_button_colors-icon_color",
+        "label": "Icon color",
+        "type": "string",
+        "defaultValue": "#ffffff",
+        "placeholder": "#ffffff"
+    },
+    {
+        "property": "theme-glance_button_colors-button_background",
+        "label": "Button background",
+        "type": "string",
+        "defaultValue": "#181818",
+        "placeholder": "#181818"
+    },
+    {
+        "property": "theme-glance_button_colors-button_hover_background",
+        "label": "Hover background",
+        "type": "string",
+        "defaultValue": "#2c2c2c",
+        "placeholder": "#2c2c2c"
+    },
+    {
+        "property": "theme-glance_button_colors-button_opacity",
+        "label": "Button opacity",
+        "type": "string",
+        "defaultValue": "1",
+        "placeholder": "0.85, 0.9, or 1"
+    },
+    {
+        "property": "theme-glance_button_colors-button_border",
+        "label": "Button border",
+        "type": "string",
+        "defaultValue": "none",
+        "placeholder": "none or 1px solid rgba(255,255,255,.2)"
+    },
+    {
+        "property": "theme-glance_button_colors-button_shadow",
+        "label": "Button shadow",
+        "type": "string",
+        "defaultValue": "none",
+        "placeholder": "none or 0 4px 12px rgba(0,0,0,.35)"
+    }
+]
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diff --git a/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/readme.md b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/readme.md
new file mode 100644
index 000000000..5abd47158
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+++ b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/readme.md
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+
+# Glance Button Colors
+
+Glance Button Colors lets you customize Zen Browser's floating Glance controls.
+
+Zen's workspace theme colors can sometimes make the Glance buttons difficult to read. This mod lets you set your own icon color, button background, hover background, opacity, border, and shadow.
+
+## Options
+
+- Icon color
+- Button background
+- Hover background
+- Button opacity
+- Button border
+- Button shadow
+
+## Defaults
+
+- White icons
+- Dark button background
+- Slightly lighter hover background
+- No border
+- No shadow
+- Full opacity
+
+## Notes
+
+This mod targets Zen's floating Glance controls using:
+
+.zen-glance-sidebar-container
+
+If Zen changes its internal Glance markup in a future update, this mod may need an update.
diff --git a/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/theme.json b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/theme.json
new file mode 100644
index 000000000..8f5038445
--- /dev/null
+++ b/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/theme.json
@@ -0,0 +1,15 @@
+{
+    "id": "5b3cdbdb-4445-4ed4-9255-fb53a35080cc",
+    "name": "Glance Button Colors",
+    "description": "Customize Zen Browser\u2019s floating Glance button colors.",
+    "homepage": "https://github.com/ronniemason/glance-button-colors",
+    "style": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/chrome.css",
+    "readme": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/readme.md",
+    "image": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/image.png",
+    "author": "ronniemason",
+    "version": "1.0.0",
+    "tags": [],
+    "createdAt": "2026-07-08",
+    "updatedAt": "2026-07-08",
+    "preferences": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/5b3cdbdb-4445-4ed4-9255-fb53a35080cc/preferences.json"
+}
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