How to add a border color to a button in Tkinter?

In this article, we will learn how to add border color to a button in Tkinter. In the first example, we are using the frame widget to add border color to a button in frame by highlighting the border with black color and a thickness of 2.

Example 1: Using Frame widget to add border color to a button.

Steps:

1. A frame is a container for widgets. In this article, we are using frame widget parameters as highlightbackground and highlightthickness for adding border color to the button.
2. Using Label widget to add text in GUI(graphical User Interface) with text font as a parameter.
3. The Entry widget is used to take single-line input from the user.
4. A frame with a thickness of 2 and a highlight background color as black is used for the button.
5. Button widget with text as “Submit”, button background color as yellow with foreground color for text on the button is used as black in this GUI.
6. Finally, a button with black border color with text as Submit is created successfully.

Below is the implementation:

Python3

import tkinter as tk

root = tk.Tk()
root.geometry('250x150')
root.title("Button Border")

# Label
l = tk.Label(root, text = "Enter your Roll No. :",
             font = (("Times New Roman"), 15))
l.pack()

# Entry Widget
tk.Entry(root).pack()

# for space between widgets
tk.Label(root, text=" ").pack()

# Frame for button border with black border color
button_border = tk.Frame(root, highlightbackground = "black",
                         highlightthickness = 2, bd=0)
bttn = tk.Button(button_border, text = 'Submit', fg = 'black',
                 bg = 'yellow',font = (("Times New Roman"),15))
bttn.pack()
button_border.pack()

root.mainloop()

Output:

Example 2: Using LabelFrame to add border color to a button.

Steps:

1. A LabelFrame widget in tkinter contains the functionality of both label and a frame.
2. The parameters of LabelFrame i.e., bd (border width) are taken as 6 with bg (background) color as black.
3. The button widget is used for creating a button, the text parameter is used for adding text on button, and the button background color is taken as green with black color text on it.
4. Finally, a button with black border color using LabelFrame widget with text as ‘Button’ on it is created successfully.

Below is the implementation:

Python3

from tkinter import *

window = Tk()
window.geometry('250x150')
window.title('Button Widget')

# Button with black border
border = LabelFrame(window, bd = 6, bg = "black")
border.pack(pady = 10)

btn = Button(border, text="Button", width = 8,
             bg = "#6CD300", fg = "black")
btn.pack()

window.mainloop()

Output: