title: How do I change the colour of my button and label on Tkinter?
body: <p>My task is to create a label and button on Tkinter. The button has to change the label, and I have to change the colour of the button and the label. I have changed the colour of the background but I can't figure out how to do the same for the label and button.</p>
  
  <pre><code>from tkinter import *
  from tkinter import ttk
  
  def change():
      print("change functon called")
  
  def main():
      rootWindow = Tk()
      rootWindow.geometry('400x400')
      rootWindow.configure(bg="red")
  
      global Label
      label = ttk.Label( rootWindow, text="Hello World!" )
      label.pack()
  
      button1 = ttk.Button( rootWindow, text="Change Label",
                          command=change)
      button1.pack()
  
      rootWindow.mainloop()
  
  main()
  </code></pre>