doc: enhance documentation on fallback values for OSD style

diff --git a/docs/labwc-theme.5.scd b/docs/labwc-theme.5.scd
index bc6e11d7f00284316d9be4b69121399e7e528bf4..deda8abec710157c55832a639a55beacd0e60045 100644 (file)
--- a/docs/labwc-theme.5.scd
+++ b/docs/labwc-theme.5.scd
@@ -155,16 +155,19 @@ elements are not listed here, but are supported.
        Menu separator color. Default #888888.
 
 *osd.bg.color*
-       Background color of on-screen-display.
+       Background color of on-screen-display. Inherits
+       *window.active.title.bg.color* if not set.
 
 *osd.border.color*
-       Border color of on-screen-display.
+       Border color of on-screen-display. Inherits *osd.label.text.color* if not
+       set.
 
 *osd.border.width*
        Border width of on-screen-display. Inherits *border.width* if not set.
 
 *osd.label.text.color*
-       Text color of on-screen-display.
+       Text color of on-screen-display. Inherits *window.active.label.text.color* if
+       not set.
 
 *osd.window-switcher.width*
        Width of window switcher in pixels. Default is 600.