diff --git a/gtk2_ardour/themes/adwaita_dark-ardour.colors b/gtk2_ardour/themes/adwaita_dark-ardour.colors
index fc28ef18ae..67890f9f62 100644
--- a/gtk2_ardour/themes/adwaita_dark-ardour.colors
+++ b/gtk2_ardour/themes/adwaita_dark-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio bus base" alias="neutral:background"/>
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation line" alias="alert:green"/>
     <ColorAlias name="automation track outline" alias="theme:bg2"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
diff --git a/gtk2_ardour/themes/blueberry_milk-ardour.colors b/gtk2_ardour/themes/blueberry_milk-ardour.colors
index 4a0d3fb7ef..5f725395e4 100644
--- a/gtk2_ardour/themes/blueberry_milk-ardour.colors
+++ b/gtk2_ardour/themes/blueberry_milk-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio track base" alias="neutral:background"/>
     <ColorAlias name="automation line" alias="alert:blue"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="big clock active:gtk_somewhat_bright_indicator background" alias="neutral:backgroundest"/>
     <ColorAlias name="big clock active: cursor" alias="theme:contrasting alt"/>
     <ColorAlias name="big clock active: edited text" alias="theme:contrasting alt"/>
diff --git a/gtk2_ardour/themes/caineville-ardour.colors b/gtk2_ardour/themes/caineville-ardour.colors
index 5684d8d025..86b31125c6 100644
--- a/gtk2_ardour/themes/caineville-ardour.colors
+++ b/gtk2_ardour/themes/caineville-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
     <ColorAlias name="automation line" alias="theme:contrasting"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
     <ColorAlias name="big clock active: cursor" alias="theme:contrasting alt"/>
diff --git a/gtk2_ardour/themes/captain_light-ardour.colors b/gtk2_ardour/themes/captain_light-ardour.colors
index 26746fc701..cd77c3d5ce 100644
--- a/gtk2_ardour/themes/captain_light-ardour.colors
+++ b/gtk2_ardour/themes/captain_light-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
     <ColorAlias name="automation line" alias="neutral:backgroundest"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
     <ColorAlias name="big clock active: cursor" alias="theme:contrasting alt"/>
diff --git a/gtk2_ardour/themes/clear_gray-ardour.colors b/gtk2_ardour/themes/clear_gray-ardour.colors
index 01b4ed2531..6eb8a5789f 100644
--- a/gtk2_ardour/themes/clear_gray-ardour.colors
+++ b/gtk2_ardour/themes/clear_gray-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
     <ColorAlias name="automation line" alias="neutral:backgroundest"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
     <ColorAlias name="big clock active: cursor" alias="theme:contrasting alt"/>
diff --git a/gtk2_ardour/themes/cubasish-ardour.colors b/gtk2_ardour/themes/cubasish-ardour.colors
index 0bad8b3255..7f525aa7c9 100644
--- a/gtk2_ardour/themes/cubasish-ardour.colors
+++ b/gtk2_ardour/themes/cubasish-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
     <ColorAlias name="automation line" alias="alert:greenish"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
     <ColorAlias name="big clock active: cursor" alias="theme:contrasting alt"/>
diff --git a/gtk2_ardour/themes/dark-ardour.colors b/gtk2_ardour/themes/dark-ardour.colors
index cd78e7f094..335c197284 100644
--- a/gtk2_ardour/themes/dark-ardour.colors
+++ b/gtk2_ardour/themes/dark-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio automation track fill" alias="theme:bg"/>
     <ColorAlias name="audio bus base" alias="widget:blue darker"/>
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
     <ColorAlias name="automation line" alias="alert:green"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
diff --git a/gtk2_ardour/themes/diehard3-ardour.colors b/gtk2_ardour/themes/diehard3-ardour.colors
index f62f44b1f5..d2bd3bdc0a 100644
--- a/gtk2_ardour/themes/diehard3-ardour.colors
+++ b/gtk2_ardour/themes/diehard3-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio bus base" alias="widget:blue"/>
     <ColorAlias name="audio master bus base" alias="neutral:background"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation line" alias="alert:green"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
diff --git a/gtk2_ardour/themes/recbox-ardour.colors b/gtk2_ardour/themes/recbox-ardour.colors
index 9297f7f06d..65bb6796bd 100644
--- a/gtk2_ardour/themes/recbox-ardour.colors
+++ b/gtk2_ardour/themes/recbox-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio bus base" alias="widget:blue darker"/>
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation line" alias="alert:green"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
diff --git a/gtk2_ardour/themes/unastudia-ardour.colors b/gtk2_ardour/themes/unastudia-ardour.colors
index f37d6be8a2..25b2ae2376 100644
--- a/gtk2_ardour/themes/unastudia-ardour.colors
+++ b/gtk2_ardour/themes/unastudia-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio track base" alias="neutral:background2"/>
     <ColorAlias name="automation line" alias="widget:blue"/>
     <ColorAlias name="automation track outline" alias="theme:bg1"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
     <ColorAlias name="big clock active: cursor" alias="theme:contrasting alt"/>
     <ColorAlias name="big clock active: edited text" alias="theme:contrasting alt"/>
diff --git a/gtk2_ardour/themes/xcolors-ardour.colors b/gtk2_ardour/themes/xcolors-ardour.colors
index 38b81faa8b..615d77e490 100644
--- a/gtk2_ardour/themes/xcolors-ardour.colors
+++ b/gtk2_ardour/themes/xcolors-ardour.colors
@@ -59,6 +59,7 @@
     <ColorAlias name="audio master bus base" alias="neutral:backgroundest"/>
     <ColorAlias name="audio track base" alias="neutral:background"/>
     <ColorAlias name="automation line" alias="alert:greenish"/>
+    <ColorAlias name="automation line insensitive" alias="neutral:foreground2"/>
     <ColorAlias name="automation track outline" alias="theme:bg2"/>
     <ColorAlias name="big clock active: background" alias="neutral:backgroundest"/>
     <ColorAlias name="big clock active: cursor" alias="theme:contrasting alt"/>