Update pywalfox.json

Now uses correct colors for dark mode and as-close-to-correct-as-possible colors for light mode. Removed colors 16-19; pywalfox can only read colors 0-15.

Assets/Templates/pywalfox.json

@@ -2,7 +2,7 @@
   "wallpaper": "{{image}}",
   "alpha": "100",
   "colors": {
-    "color0": "{{colors.surface.default.hex}}",
+    "color0": "{{colors.surface.dark.hex}}",
     "color1": "",
     "color2": "",
     "color3": "{{colors.primary.default.hex}}",
@@ -18,9 +18,5 @@
     "color13": "{{colors.secondary.default.hex}}",
     "color14": "",
     "color15": "{{colors.on_background.default.hex}}",
-    "color16": "{{colors.on_surface.default.hex}}",
-    "color17": "{{colors.surface_container.default.hex}}",
-    "color18": "",
-    "color19": "{{colors.background.default.hex}}"
   }
 }