Fix: color doesnt exist error (#438)

* color property check added

* color property check shortened

* color property check reversed

sources/graphics_chart_drawer.py

@@ -42,7 +42,7 @@ async def create_loc_graph(yearly_data: Dict, save_path: str):
     cumulative = zeros((years, 4, 2), dtype=int)
 
     for key, value in languages_all_loc.items():
-        color = colors[key]["color"] if colors[key]["color"] is not None else "w"
+        color = colors[key].get("color", "tab:gray")
         language_handles += [mpatches.Patch(color=color, label=key)]
 
         for quarter in range(4):