diff --git a/dynamic-theme/background.js b/dynamic-theme/background.js
index dbf6d6d8..3adcd5de 100644
--- a/dynamic-theme/background.js
+++ b/dynamic-theme/background.js
@@ -3,20 +3,20 @@ var currentTheme = '';
 const themes = {
   'day': {
     images: {
-      headerURL: 'sun.jpg',
+      theme_frame: 'sun.jpg',
     },
     colors: {
-      accentcolor: '#CF723F',
-      textcolor: '#111',
+      frame: '#CF723F',
+      tab_background_text: '#111',
     }
   },
   'night': {
     images: {
-      headerURL: 'moon.jpg',
+      theme_frame: 'moon.jpg',
     },
     colors: {
-      accentcolor: '#000',
-      textcolor: '#fff',
+      frame: '#000',
+      tab_background_text: '#fff',
     }
   }
 };
diff --git a/examples.json b/examples.json
index d952b100..1cf99499 100644
--- a/examples.json
+++ b/examples.json
@@ -535,7 +535,7 @@
         "name": "theme-switcher"
     },
     {
-        "description": "A collection of themes illustrating:<ul><li>weta_fade: a basic theme employing a single image specified in <code>headerURL:</code>.</li><li>weta_fade_chrome: the weta_fade theme implemented with Chrome compatible manifest keys.</li><li>weta_tiled: a theme using a tiled image.</li><li>weta_mirror: a theme using multiple images and aligning those images in the header.</li><li>animated: use of an animated PNG.</li></ul>",
+        "description": "A collection of themes illustrating:<ul><li>weta_fade: a basic theme employing a single image specified in <code>theme_frame:</code>.</li><li>weta_fade_chrome: the weta_fade theme implemented with Chrome compatible manifest keys.</li><li>weta_tiled: a theme using a tiled image.</li><li>weta_mirror: a theme using multiple images and aligning those images in the header.</li><li>animated: use of an animated PNG.</li></ul>",
         "javascript_apis": [],
         "name": "themes"
     },
diff --git a/private-browsing-theme/background.js b/private-browsing-theme/background.js
index b229b5e6..963dff8b 100644
--- a/private-browsing-theme/background.js
+++ b/private-browsing-theme/background.js
@@ -8,11 +8,11 @@ function themeWindow(window) {
   if (window.incognito) {
     browser.theme.update(window.id, {
       images: {
-        headerURL: "",
+        theme_frame: "",
       },
       colors: {
-        accentcolor: "black",
-        textcolor: "white",
+        frame: "black",
+        tab_background_text: "white",
         toolbar: "#333",
         toolbar_text: "white"
       }
diff --git a/theme-integrated-sidebar/README.md b/theme-integrated-sidebar/README.md
index 16f39d05..24d44f0f 100644
--- a/theme-integrated-sidebar/README.md
+++ b/theme-integrated-sidebar/README.md
@@ -10,6 +10,6 @@ How to use the browser.theme.getCurrent(), browser.theme.onUpdated and the sideb
 
 ## Instructions to try this
 
-- Install a WebExtension theme that sets `accentcolor`, `toolbar` or `toolbar_text`
+- Install a WebExtension theme that sets `frame`, `toolbar` or `toolbar_text`
 - Install this extension
 - The sidebar should then use colors from the WebExtension theme
\ No newline at end of file
diff --git a/theme-integrated-sidebar/sidebar.js b/theme-integrated-sidebar/sidebar.js
index 93e81ba7..7a826d4c 100644
--- a/theme-integrated-sidebar/sidebar.js
+++ b/theme-integrated-sidebar/sidebar.js
@@ -1,10 +1,9 @@
 function setSidebarStyle(theme) {
   const myElement = document.getElementById("myElement");
 
-  // colors.frame and colors.accentcolor are aliases
-  if (theme.colors && (theme.colors.accentcolor || theme.colors.frame)) {
+  if (theme.colors && theme.colors.frame) {
     document.body.style.backgroundColor =
-      theme.colors.accentcolor || theme.colors.frame;
+      theme.colors.frame;
   } else {
     document.body.style.backgroundColor = "white";
   }
diff --git a/themes/animated/README.md b/themes/animated/README.md
index f1e4744b..ff5f768d 100644
--- a/themes/animated/README.md
+++ b/themes/animated/README.md
@@ -2,7 +2,7 @@
 
 ## What it does
 
-Employs an animated PNG image as the headerURL image in a theme.
+Employs an animated PNG image as the theme_frame image in a theme.
 
 ## What it shows
 
diff --git a/themes/weta_fade/README.md b/themes/weta_fade/README.md
index e2fd8d1a..84e21b72 100644
--- a/themes/weta_fade/README.md
+++ b/themes/weta_fade/README.md
@@ -2,7 +2,7 @@
 
 ## What it does
 
-Employs a PNG image as the headerURL image in a theme.
+Employs a PNG image as the theme_frame image in a theme.
 
 ## What it shows