Another alternative to create button is to create a label and bind it to the action functions. In the below example .bind() is used to connect the label with respective function. You can design according to your requirements.

from tkinter import *

def OnPressed(event):
    print('Hello')
def OnHover(event):
    But.config(bg='red', fg='white')
def OnLeave(event):
    But.config(bg='white', fg='black')

root = Tk()

But = Label(root, text='Hi', bg='white', relief='groove')
But.place(x=10, y=10, width=100)
But.bind('<Button-1>', OnPressed)
But.bind('<Enter>', OnHover)
But.bind('<Leave>', OnLeave)

root.mainloop()

On Windows 10, I have run into the same problem, and have found a solution, although not a very satisfying one. The following will create a black button with white foreground type:

First define a custom button style based on the standard TButton style

mystyle = ttk.Style()
mystyle.configure('mycustom.TButton',background='black',foreground='white')

Then create the button using the new custom style

mybutton = ttk.Button(root,style='mycustom.Tbutton')

I say 'not very satisfying' because this only works if I have previously set the overall theme to 'default' as follows:

mystyle = ttk.Style()
mystyle.theme_use('default')

Using any of the other themes available on my system (winnative,clam,alt,classic,vista and xpnative) will change only the border to black, and leave the background grey.

I created a library called CustomTkinter, and with it you can create more or less exactly what is shown in the images above. CustomTkinter provides widgets to be used similar to Tkinter. They can be customised in color and shape, here I tried to create something similar to the image above:

There is not also a button, but many other elements, and it also supports a dark and light theme:

You can check out the library here:

https://customtkinter.tomschimansky.com https://github.com/TomSchimansky/CustomTkinter

A simple example would be:

import customtkinter

customtkinter.set_appearance_mode("System")
customtkinter.set_default_color_theme("blue")

app = customtkinter.CTk()  # create window
app.geometry("400x240")

def button_callback():
    print("button pressed")

# create button
button = customtkinter.CTkButton(app, command=button_callback)
button.grid(row=0, column=0, padx=20, pady=20)

app.mainloop()

which gives the following on macOS: