diff --git a/sway/sway-bar.5.scd b/sway/sway-bar.5.scd
index 42e59d57..27709d07 100644
--- a/sway/sway-bar.5.scd
+++ b/sway/sway-bar.5.scd
@@ -222,6 +222,10 @@ must be defined in hex: _#RRGGBB_ or _#RRGGBBAA_.
 	Border, background and text color for a workspace button when the workspace
 	contains a window with the urgency hint set.
 
+*empty_workspace* <border> <background> <text>
+	Border, background and text color for a workspace button when the workspace
+	contains no windows and is not active.
+
 *binding_mode* <border> <background> <text>
 	Border, background and text color for the binding mode indicator. If not used,
 	the colors will be taken from _urgent_workspace_.
diff --git a/sway/sway-ipc.7.scd b/sway/sway-ipc.7.scd
index e49c97a0..b62991a3 100644
--- a/sway/sway-ipc.7.scd
+++ b/sway/sway-ipc.7.scd
@@ -918,6 +918,15 @@ containing the _#RRGGBBAA_ representation of the color:
 |- urgent_workspace_border
 :  The color to use for the border of the workspace buttons for workspaces that
    contain an urgent view
+|- empty_workspace_text
+:  The color to use for the text of the workspace buttons for workspaces that
+   are empty
+|- empty_workspace_bg
+:  The color to use for the background of the workspace buttons for workspaces
+   that are empty
+|- empty_workspace_border
+:  The color to use for the border of the workspace buttons for workspaces that
+   are empty
 |- binding_mode_text
 :  The color to use for the text of the binding mode indicator
 |- binding_mode_bg
@@ -967,6 +976,9 @@ containing the _#RRGGBBAA_ representation of the color:
 		"urgent_workspace_border": "#2f343aff",
 		"urgent_workspace_bg": "#900000ff",
 		"urgent_workspace_text": "#ffffffff",
+		"empty_workspace_border": "#000000ff",
+		"empty_workspace_bg": "#000000ff",
+		"empty_workspace_text": "#666666ff",
 		"binding_mode_border": "#2f343aff",
 		"binding_mode_bg": "#900000ff",
 		"binding_mode_text": "#ffffffff"