adjust wezterm scroll bar "thumb" colour

wezterm/wezterm.lua

@@ -56,6 +56,7 @@ config.colors = {
 			bg_color = "#000000",
 		},
 	},
+	scrollbar_thumb = "#888888",
 }
 -- config.color_scheme = "Gnometerm (terminal.sexy)"
 
@@ -208,4 +209,20 @@ end)
 
 --------------------------------------------------------------------------------
 
+-- copied from https://github.com/wez/wezterm/issues/4331
+-- however it has some issues, seems to reset color theme to default?
+
+-- wezterm.on("update-status", function(window, pane)
+-- 	local overrides = window:get_config_overrides() or {}
+-- 	if not overrides.colors then
+-- 		overrides.colors = {}
+-- 	end
+-- 	if pane:is_alt_screen_active() then
+-- 		overrides.colors.scrollbar_thumb = "transparent"
+-- 	else
+-- 		overrides.colors.scrollbar_thumb = nil
+-- 	end
+-- 	window:set_config_overrides(overrides)
+-- end)
+
 return config