Скачать или смотреть Azure Theme custom made for new Tkinter look

ttk style usage for a new them to be used with tkinter in Python to make modern GUIs https://pythonprogramming.altervista....
The repository with the theme https://github.com/formazione/Azure-t...

New repository for version 2
https://github.com/formazione/azure_t...

You can make your own theme changing what's inside the images folder.

1:41 Create the button
2:55 button final result
3:40 change text color of the button
3:50 create a toggle button
4:38 switch button

Another theme (sun valley) by the same coder:
https://pythonprogramming.altervista....

As one person asked me how to change the color if the user insert an invalid text into an entry, I will put here the example (and also in the blog post):

def check_entry():
print(entry.get())
if "@" not in entryVar.get():
print("there is no @")
entry.state(["invalid"])
print(entry.state())

entryVar = tk.StringVar()
entry = ttk.Entry(root, textvariable=entryVar,)
entry.place(x=250, y=20)
entry.insert(0, 'Entry')
button1 = ttk.Button(root, text="CHECK", command=check_entry)
button1.place(x=350, y=20)