diff --git a/gtk2_ardour/editor_markers.cc b/gtk2_ardour/editor_markers.cc
index 92aa3a097a..6445b1edfc 100644
--- a/gtk2_ardour/editor_markers.cc
+++ b/gtk2_ardour/editor_markers.cc
@@ -146,6 +146,8 @@ Editor::add_new_location_internal (Location* location)
 		color = X_("location arrangement marker");
 	} else if (location->is_mark()) {
 		color = X_("location marker");
+	} else if (location->is_session_range()) {
+		color = X_("location session");
 	} else if (location->is_auto_loop()) {
 		color = X_("location loop");
 	} else if (location->is_auto_punch()) {
diff --git a/gtk2_ardour/themes/adwaita_dark-ardour.colors b/gtk2_ardour/themes/adwaita_dark-ardour.colors
index de091f4c14..f81b3107a5 100644
--- a/gtk2_ardour/themes/adwaita_dark-ardour.colors
+++ b/gtk2_ardour/themes/adwaita_dark-ardour.colors
@@ -199,6 +199,7 @@
     <ColorAlias name="location marker" alias="alert:yellow"/>
     <ColorAlias name="location punch" alias="alert:red"/>
     <ColorAlias name="location range" alias="alert:blue"/>
+    <ColorAlias name="location session" alias="alert:blue"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
     <ColorAlias name="lua action button: fill" alias="widget:bg"/>
diff --git a/gtk2_ardour/themes/blueberry_milk-ardour.colors b/gtk2_ardour/themes/blueberry_milk-ardour.colors
index 5ac0f5aa7b..e78a7c0a57 100644
--- a/gtk2_ardour/themes/blueberry_milk-ardour.colors
+++ b/gtk2_ardour/themes/blueberry_milk-ardour.colors
@@ -195,6 +195,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting alt"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:green"/>
+    <ColorAlias name="location session" alias="alert:green"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting clock"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
diff --git a/gtk2_ardour/themes/caineville-ardour.colors b/gtk2_ardour/themes/caineville-ardour.colors
index 3e52a1bc26..4eee14fa3a 100644
--- a/gtk2_ardour/themes/caineville-ardour.colors
+++ b/gtk2_ardour/themes/caineville-ardour.colors
@@ -196,6 +196,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting alt"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:green"/>
+    <ColorAlias name="location session" alias="alert:green"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting clock"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
diff --git a/gtk2_ardour/themes/captain_light-ardour.colors b/gtk2_ardour/themes/captain_light-ardour.colors
index 14c17efb4d..f10a06cb47 100644
--- a/gtk2_ardour/themes/captain_light-ardour.colors
+++ b/gtk2_ardour/themes/captain_light-ardour.colors
@@ -198,6 +198,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting alt"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:green"/>
+    <ColorAlias name="location session" alias="alert:green"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
     <ColorAlias name="lua action button: fill" alias="widget:bg"/>
diff --git a/gtk2_ardour/themes/clear_gray-ardour.colors b/gtk2_ardour/themes/clear_gray-ardour.colors
index d88a721689..17d6445434 100644
--- a/gtk2_ardour/themes/clear_gray-ardour.colors
+++ b/gtk2_ardour/themes/clear_gray-ardour.colors
@@ -196,6 +196,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:green"/>
+    <ColorAlias name="location session" alias="alert:green"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting clock"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
diff --git a/gtk2_ardour/themes/cubasish-ardour.colors b/gtk2_ardour/themes/cubasish-ardour.colors
index 1e18f2c17c..30197cfb9a 100644
--- a/gtk2_ardour/themes/cubasish-ardour.colors
+++ b/gtk2_ardour/themes/cubasish-ardour.colors
@@ -196,6 +196,7 @@
     <ColorAlias name="location marker" alias="widget:blue"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:green"/>
+    <ColorAlias name="location session" alias="alert:green"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting alt"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
diff --git a/gtk2_ardour/themes/dark-ardour.colors b/gtk2_ardour/themes/dark-ardour.colors
index b0187a9ed1..ac54463d5a 100644
--- a/gtk2_ardour/themes/dark-ardour.colors
+++ b/gtk2_ardour/themes/dark-ardour.colors
@@ -199,6 +199,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting less"/>
     <ColorAlias name="location punch" alias="widget:ruddy"/>
     <ColorAlias name="location range" alias="theme:contrasting less"/>
+    <ColorAlias name="location session" alias="theme:contrasting less"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
     <ColorAlias name="lua action button: fill" alias="widget:bg"/>
diff --git a/gtk2_ardour/themes/diehard3-ardour.colors b/gtk2_ardour/themes/diehard3-ardour.colors
index 74df9a7cea..82c7183bdd 100644
--- a/gtk2_ardour/themes/diehard3-ardour.colors
+++ b/gtk2_ardour/themes/diehard3-ardour.colors
@@ -197,6 +197,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting clock"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:green"/>
+    <ColorAlias name="location session" alias="alert:green"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting alt"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
diff --git a/gtk2_ardour/themes/recbox-ardour.colors b/gtk2_ardour/themes/recbox-ardour.colors
index 2c6471eece..672bb983bc 100644
--- a/gtk2_ardour/themes/recbox-ardour.colors
+++ b/gtk2_ardour/themes/recbox-ardour.colors
@@ -197,6 +197,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting clock"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:green"/>
+    <ColorAlias name="location session" alias="alert:green"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting alt"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
diff --git a/gtk2_ardour/themes/unastudia-ardour.colors b/gtk2_ardour/themes/unastudia-ardour.colors
index 6281b435a5..4346979f22 100644
--- a/gtk2_ardour/themes/unastudia-ardour.colors
+++ b/gtk2_ardour/themes/unastudia-ardour.colors
@@ -195,6 +195,7 @@
     <ColorAlias name="location marker" alias="theme:contrasting clock"/>
     <ColorAlias name="location punch" alias="alert:ruddy"/>
     <ColorAlias name="location range" alias="alert:blue"/>
+    <ColorAlias name="location session" alias="alert:blue"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting alt"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>
diff --git a/gtk2_ardour/themes/xcolors-ardour.colors b/gtk2_ardour/themes/xcolors-ardour.colors
index aaa84ec63a..6d147254fa 100644
--- a/gtk2_ardour/themes/xcolors-ardour.colors
+++ b/gtk2_ardour/themes/xcolors-ardour.colors
@@ -196,6 +196,7 @@
     <ColorAlias name="location marker" alias="alert:yellow"/>
     <ColorAlias name="location punch" alias="alert:red"/>
     <ColorAlias name="location range" alias="alert:greenish"/>
+    <ColorAlias name="location session" alias="alert:greenish"/>
     <ColorAlias name="location arrangement marker" alias="theme:contrasting alt"/>
     <ColorAlias name="lock button: fill active" alias="widget:bg"/>
     <ColorAlias name="lock button: led active" alias="alert:red"/>