diff --git a/chess_menu.py b/chess_menu.py
index 8efb7b0..31a42dd 100644
--- a/chess_menu.py
+++ b/chess_menu.py
@@ -15,22 +15,22 @@
 def mainMenu():
     """Initial menu for choosing settings in the chess game."""
     WINDOW_TITLE = "Chess Menu"
-    WINDOW_BG = "#5285B4"
-    TEXT_COLOR = "#F5F5F5"
+    WINDOW_BG = "#5285b4"
+    TEXT_COLOR = "#f5f5f5"
     SCREEN_SIZE = "500x300"
     TEXT_KWARGS = dict(
         bg = WINDOW_BG,
         fg = TEXT_COLOR,
         # padx = 0,
     )
-    
+
     root = tk.Tk()
     root.geometry(SCREEN_SIZE)
     root.title(WINDOW_TITLE)
     root.configure(bg=WINDOW_BG)
     tk.Label(
         root, text="Chess", font="Helvetica 20 bold", **TEXT_KWARGS).pack()
-    
+
     # Menu line for choosing to play a human opponent or the computer.
     tk.Label(
         root, text="Play with:", font="Helvetica 14 bold", **TEXT_KWARGS).place(
@@ -44,7 +44,7 @@ def mainMenu():
         root, text="Computer", font="Helvetica 14", variable=opponentIsAI,
         value=True)  # , **TEXT_KWARGS)
     rBtn_Computer.place(x=300, y=50)
-    
+
     # Menu line for choosing player color.
     tk.Label(
         root, text= "Play as:", font="Helvetica 14 bold", **TEXT_KWARGS).place(
@@ -59,7 +59,7 @@ def mainMenu():
     rBtn_White.place(x=200, y=90)
     rBtn_Black.place(x=290, y=90)
     rBtn_Random.place(x=380, y=90)
-    
+
     # Theme
     tk.Label(
         root, text="Theme:", font="Helvetica 14 bold", **TEXT_KWARGS).place(
@@ -68,7 +68,7 @@ def mainMenu():
     themeMenu = ttk.Combobox(root, values=theme_list, state="READONLY")
     themeMenu.set("Select a theme")
     themeMenu.place(x=200, y=136)
-    
+
     # Start game button
     def getValues():
         global humanWhite, humanBlack, theme
@@ -84,9 +84,9 @@ def getValues():
             elif color == 1:
                 humanWhite, humanBlack = False, True
         theme = themeMenu.get()
-        
+
         root.destroy()
-    
+
     tk.Button(
         root,
         text="Play Chess!",