diff --git a/gtk2_ardour/themes/adwaita_dark-ardour.colors b/gtk2_ardour/themes/adwaita_dark-ardour.colors
index b9a78a8af4..2741c50f8d 100644
--- a/gtk2_ardour/themes/adwaita_dark-ardour.colors
+++ b/gtk2_ardour/themes/adwaita_dark-ardour.colors
@@ -94,6 +94,7 @@
     <ColorAlias name="entered automation line" alias="widget:orange"/>
     <ColorAlias name="entered gain line" alias="widget:orange"/>
     <ColorAlias name="entered marker" alias="widget:orange"/>
+    <ColorAlias name="fader outline" alias="neutral:backgroundest"/>
     <ColorAlias name="feedback alert: alt active" alias="alert:ruddy"/>
     <ColorAlias name="feedback alert: fill" alias="widget:bg"/>
     <ColorAlias name="feedback alert: fill active" alias="alert:red"/>
@@ -114,6 +115,7 @@
     <ColorAlias name="generic button: fill" alias="widget:bg"/>
     <ColorAlias name="generic button: fill active" alias="alert:red"/>
     <ColorAlias name="generic button: led active" alias="alert:blue"/>
+    <ColorAlias name="generic button: outline" alias="neutral:backgroundest"/>
     <ColorAlias name="ghost track base" alias="widget:green lighter"/>
     <ColorAlias name="ghost track midi outline" alias="neutral:backgroundest"/>
     <ColorAlias name="ghost track wave" alias="neutral:midground"/>
@@ -202,6 +204,7 @@
     <ColorAlias name="meter color BBC" alias="alert:orange"/>
     <ColorAlias name="meter marker" alias="widget:orange"/>
     <ColorAlias name="meter marker music" alias="widget:orange"/>
+    <ColorAlias name="meter outline" alias="neutral:backgroundest"/>
     <ColorAlias name="meterbridge label: fill" alias="theme:bg"/>
     <ColorAlias name="meterbridge label: fill active" alias="neutral:background2"/>
     <ColorAlias name="meterbridge label: led" alias="alert:red"/>