diff --git a/gtk2_ardour/dark.colors b/gtk2_ardour/dark.colors
index 8e90adeb27..74d0206822 100644
--- a/gtk2_ardour/dark.colors
+++ b/gtk2_ardour/dark.colors
@@ -369,7 +369,7 @@
     <ColorAlias name="recording rect" alias="color 86"/>
     <ColorAlias name="recording waveform fill" alias="color 13"/>
     <ColorAlias name="recording waveform outline" alias="color 43"/>
-    <ColorAlias name="region base" alias="color 94"/>
+    <ColorAlias name="time axis view item base" alias="color 94"/>
     <ColorAlias name="region list automatic" alias="color 53"/>
     <ColorAlias name="region list missing source" alias="color 9"/>
     <ColorAlias name="region list whole file" alias="color 1"/>
@@ -499,8 +499,9 @@
     <Modifier name="piano roll black" modifier="= alpha:0.331098"/>
     <Modifier name="piano roll white" modifier="= alpha:0.4627"/>
     <Modifier name="recording rect" modifier="= alpha:0.25"/>
-    <Modifier name="region base" modifier="= alpha:0.99"/>
-    <Modifier name="opaque region base" modifier="= alpha:0.99"/>
+    <Modifier name="time axis view item base" modifier="= alpha:0.7"/>
+    <Modifier name="covered region base" modifier="= alpha:0.7"/>
+    <Modifier name="opaque region base" modifier="= alpha:0.7"/>
     <Modifier name="transparent region base" modifier="= alpha:0.50"/>
     <Modifier name="selected midi note" modifier="= alpha:0.7529"/>
     <Modifier name="selection rect" modifier="= alpha:0.4666"/>