调整画板颜色

@@ -796,7 +796,7 @@
     function choose(agrs) {
         switch (agrs) {
             case 1:
-                chooseColor.style.background = 'url("images/color1-n.png") no-repeat';
+                chooseColor.style.background = 'url("images/color6-n.png") no-repeat';
                 chooseColor.title = "#b8242a";
                 break;
             case 2: