diff --git a/gtk2_ardour/themes/blueberry_milk-ardour.colors b/gtk2_ardour/themes/blueberry_milk-ardour.colors
index 69f07acd63..c7d5f508b9 100644
--- a/gtk2_ardour/themes/blueberry_milk-ardour.colors
+++ b/gtk2_ardour/themes/blueberry_milk-ardour.colors
@@ -383,7 +383,7 @@
     <ColorAlias name="send alert button: fill" alias="theme:contrasting selection"/>
     <ColorAlias name="send alert button: fill active" alias="alert:cyan"/>
     <ColorAlias name="send alert button: led active" alias="alert:red"/>
-    <ColorAlias name="send bg" alias="alert:cyan"/>
+    <ColorAlias name="send bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle" alias="widget:bg"/>
     <ColorAlias name="shuttle bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle text" alias="neutral:foregroundest"/>
diff --git a/gtk2_ardour/themes/caineville-ardour.colors b/gtk2_ardour/themes/caineville-ardour.colors
index a630d8b389..de6540b40e 100644
--- a/gtk2_ardour/themes/caineville-ardour.colors
+++ b/gtk2_ardour/themes/caineville-ardour.colors
@@ -384,7 +384,7 @@
     <ColorAlias name="send alert button: fill" alias="theme:contrasting selection"/>
     <ColorAlias name="send alert button: fill active" alias="alert:cyan"/>
     <ColorAlias name="send alert button: led active" alias="alert:red"/>
-    <ColorAlias name="send bg" alias="alert:cyan"/>
+    <ColorAlias name="send bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle" alias="widget:bg"/>
     <ColorAlias name="shuttle bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle text" alias="neutral:foregroundest"/>
diff --git a/gtk2_ardour/themes/clear_gray-ardour.colors b/gtk2_ardour/themes/clear_gray-ardour.colors
index 16a3ad7789..c44f60f632 100644
--- a/gtk2_ardour/themes/clear_gray-ardour.colors
+++ b/gtk2_ardour/themes/clear_gray-ardour.colors
@@ -384,7 +384,7 @@
     <ColorAlias name="send alert button: fill" alias="theme:contrasting selection"/>
     <ColorAlias name="send alert button: fill active" alias="alert:cyan"/>
     <ColorAlias name="send alert button: led active" alias="alert:red"/>
-    <ColorAlias name="send bg" alias="alert:cyan"/>
+    <ColorAlias name="send bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle" alias="widget:bg"/>
     <ColorAlias name="shuttle bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle text" alias="neutral:foregroundest"/>
diff --git a/gtk2_ardour/themes/cubasish-ardour.colors b/gtk2_ardour/themes/cubasish-ardour.colors
index e2b2eb40f9..88679c8f08 100644
--- a/gtk2_ardour/themes/cubasish-ardour.colors
+++ b/gtk2_ardour/themes/cubasish-ardour.colors
@@ -384,7 +384,7 @@
     <ColorAlias name="send alert button: fill" alias="theme:contrasting selection"/>
     <ColorAlias name="send alert button: fill active" alias="alert:cyan"/>
     <ColorAlias name="send alert button: led active" alias="alert:red"/>
-    <ColorAlias name="send bg" alias="alert:cyan"/>
+    <ColorAlias name="send bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle" alias="widget:bg"/>
     <ColorAlias name="shuttle bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle text" alias="neutral:foregroundest"/>
diff --git a/gtk2_ardour/themes/dark-ardour.colors b/gtk2_ardour/themes/dark-ardour.colors
index 570766fe0f..11d2bd1286 100644
--- a/gtk2_ardour/themes/dark-ardour.colors
+++ b/gtk2_ardour/themes/dark-ardour.colors
@@ -384,7 +384,7 @@
     <ColorAlias name="send alert button: fill" alias="theme:contrasting selection"/>
     <ColorAlias name="send alert button: fill active" alias="alert:cyan"/>
     <ColorAlias name="send alert button: led active" alias="alert:red"/>
-    <ColorAlias name="send bg" alias="alert:cyan"/>
+    <ColorAlias name="send bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle" alias="widget:bg"/>
     <ColorAlias name="shuttle bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle text" alias="neutral:foregroundest"/>
diff --git a/gtk2_ardour/themes/unastudia-ardour.colors b/gtk2_ardour/themes/unastudia-ardour.colors
index 28a224fb14..06daf6c53b 100644
--- a/gtk2_ardour/themes/unastudia-ardour.colors
+++ b/gtk2_ardour/themes/unastudia-ardour.colors
@@ -383,7 +383,7 @@
     <ColorAlias name="send alert button: fill" alias="theme:contrasting selection"/>
     <ColorAlias name="send alert button: fill active" alias="alert:cyan"/>
     <ColorAlias name="send alert button: led active" alias="alert:red"/>
-    <ColorAlias name="send bg" alias="alert:cyan"/>
+    <ColorAlias name="send bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle" alias="widget:bg"/>
     <ColorAlias name="shuttle bg" alias="neutral:backgroundest"/>
     <ColorAlias name="shuttle text" alias="neutral:foregroundest"/>