title: How to set the color of the disabled button text?
body: <p>There is a button.<br>
  How can I set the color of the disabled button text?</p>
  
  <pre><code>import tkinter as tk
  
  root = tk.Tk()
  frame = tk.Frame(root)
  frame.pack()
  
  button = tk.Button(frame, text="X", fg="red")
  button.grid(row=0, column=0)
  button['state'] = tk.DISABLED
  
  root.mainloop()
  </code></pre>