diff --git a/pxtarget.json b/pxtarget.json
index afc36a4acd..b322331af0 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -621,7 +621,7 @@
             "arrays": "#FF8F08",
             "functions": "#1446A0"
         },
-        "defaultColorTheme": "arcade-light",
+        "defaultColorTheme": "arcade-legacy",
         "highContrastColorTheme": "pxt-high-contrast",
         "simAnimationEnter": "fly right in",
         "simAnimationExit": "fly right out",
diff --git a/theme/color-themes/arcade-dark.json b/theme/color-themes/arcade-dark.json
index 28bb609881..8f24bf8285 100644
--- a/theme/color-themes/arcade-dark.json
+++ b/theme/color-themes/arcade-dark.json
@@ -68,6 +68,7 @@
         "pxt-neutral-stencil3": "#3b3a39",
         "pxt-neutral-background3-alpha90": "#3b3a39",
 
+        "pxt-neutral-base": "rgba(180, 180, 180, 1)",
         "pxt-neutral-alpha0": "rgba(180, 180, 180, 0)",
         "pxt-neutral-alpha10": "rgba(180, 180, 180, 0.1)",
         "pxt-neutral-alpha20": "rgba(180, 180, 180, 0.2)",
diff --git a/theme/color-themes/arcade-legacy.json b/theme/color-themes/arcade-legacy.json
index 7a6c4c7620..d2dfd8dd9e 100644
--- a/theme/color-themes/arcade-legacy.json
+++ b/theme/color-themes/arcade-legacy.json
@@ -65,6 +65,7 @@
         "pxt-neutral-stencil3": "#FFFFFF",
         "pxt-neutral-background3-alpha90": "#4E5758E5",
 
+        "pxt-neutral-base": "rgba(0, 0, 0, 1)",
         "pxt-neutral-alpha0": "rgba(0, 0, 0, 0)",
         "pxt-neutral-alpha10": "rgba(0, 0, 0, 0.1)",
         "pxt-neutral-alpha20": "rgba(0, 0, 0, 0.2)",
diff --git a/theme/color-themes/arcade-light.json b/theme/color-themes/arcade-light.json
index bce2a97000..052b171324 100644
--- a/theme/color-themes/arcade-light.json
+++ b/theme/color-themes/arcade-light.json
@@ -65,6 +65,7 @@
         "pxt-neutral-stencil3": "#FFFFFF",
         "pxt-neutral-background3-alpha90": "#4E5758E5",
 
+        "pxt-neutral-base": "rgba(0, 0, 0, 1)",
         "pxt-neutral-alpha0": "rgba(0, 0, 0, 0)",
         "pxt-neutral-alpha10": "rgba(0, 0, 0, 0.1)",
         "pxt-neutral-alpha20": "rgba(0, 0, 0, 0.2)",
diff --git a/theme/color-themes/overrides/arcade-dark-overrides.css b/theme/color-themes/overrides/arcade-dark-overrides.css
index 7973e7672f..60ac4b944c 100644
--- a/theme/color-themes/overrides/arcade-dark-overrides.css
+++ b/theme/color-themes/overrides/arcade-dark-overrides.css
@@ -30,3 +30,16 @@
     /* Neutral and target colors are the same in dark theme, so it helps to have a clearer border when hovering over cards. */
     border-color: var(--pxt-focus-border) !important;
 }
+
+/* 
+ * Inverted image colors
+ */
+.barcharticon {
+    filter: invert(1);
+}
+
+.modals .ui.button.immersive-reader-button,
+#mainmenu .immersive-reader-button.ui.item,
+#simulator .editor-sidebar .immersive-reader-button.ui.item {
+    background-image: url("/static/icons/immersive-reader-light.svg") !important;
+}
diff --git a/theme/site/globals/site.variables b/theme/site/globals/site.variables
index 8b73b24e05..ddf03a934a 100644
--- a/theme/site/globals/site.variables
+++ b/theme/site/globals/site.variables
@@ -30,7 +30,7 @@
 
 /* 32 colors */
 @purple           : #5D4FBA;
-@blue             : #B1E3DA;
+@blue             : #116e79;
 
 @lightGrey        : #F8FAFC;