[graph-] fix to implement color_graph_refline option

visidata/graph.py

@@ -145,7 +145,7 @@ def draw_reflines(self, scr):
             for char_x in range(0, self.plotwidth//2):
                 has_x_line = char_x in self.reflines_char_x.keys()
                 if has_x_line or has_y_line:
-                    cattr = colors.color_refline
+                    cattr = colors.color_graph_refline
                     if has_x_line:
                         ch = self.reflines_char_x[char_x]
                         # where two lines cross, draw the vertical line, not the horizontal one