+ ;; The colors used to be [0.5 0.5 0.5], but that produces a black
+ ;; color on 8-color tty's, which would make the border invisible.
+ ;; 0.51 produces white on such tty's, and at the same time has
+ ;; almost no effect on X and similar displays.
+ (((glyph color-x) [0.51 0.51 0.51])