tmux.Window.SetPaneColours

SetPaneColours replaces the complete "pane-colours" window option array with SparseArraystring, preserving holes and empty values (tmux 3.3 or later). Read it with WindowOptionValues.PaneColours from Window.Options ; Window.UnsetOption restores inheritance or the global default. Replacement is not atomic: the result reports confirmed writes, and failures stop without rollback. Serialize concurrent replacement of the same target and option.