--- sgt-puzzles.orig/slant.c
+++ sgt-puzzles/slant.c
@@ -39,7 +39,7 @@
     COL_SLANT1,
     COL_SLANT2,
     COL_ERROR,
-    COL_CURSOR, COL_LOWLIGHT, /* LOWLIGHT currently not used. */
+    COL_CURSOR, COL_LOWLIGHT,
     NCOLOURS
 };
 
@@ -1889,7 +1889,9 @@
 
     draw_rect(dr, COORD(x), COORD(y), TILESIZE, TILESIZE,
 	      (v & FLASH) ? COL_GRID :
-              (v & CURSOR) ? COL_CURSOR : COL_BACKGROUND);
+              (v & CURSOR) ? COL_CURSOR :
+	      (v & (BACKSLASH | FORWSLASH)) ? COL_LOWLIGHT :
+	      COL_BACKGROUND);
 
     /*
      * Draw the grid lines.