RGBfgSel=r,g,b

RGBbgSel=r,g,b

These determine the foreground and background color used to display the selected row(s) in the specified column. The default selection color is white for the foreground and blue for the background. Changing the default color is sometimes useful, either to make selected items stand out against highly colored cell patterns, or conversely, to make selected items blend into the background. The latter is sometimes useful in conjunction with editing, where you might otherwise get an annoying "flash" as the tree switches between cell editing and selection modes.

Also see the Xtrctl table for the parameters XTR’NFSELSTYLE and XTR’SELECTAREA.