from tkinter import *

root = Tk()
root.title('Python Tkinter scale')
root.geometry('300x200')
root.resizable(0,0)
def app(val):
    if escala.get() == 1:
        root.config(bg='#7AB3BF')
    elif escala.get() == 2:
        root.config(bg='#868C54')
    elif escala.get() == 3:
        root.config(bg='#F2EFEB')
    elif escala.get() == 4:
        root.config(bg='#8C7484')
    elif escala.get() == 5:
        root.config(bg='#0487D9')
    elif escala.get() == 6:
        root.config(bg="#cfe2f3")
    elif escala.get() == 7:
        root.config(bg="#345eeb")
    elif escala.get() == 8:
        root.config(bg="#3d85c6")
    elif escala.get() == 9:
        root.config(bg="#122154")
    else:
       root.config(bg='#BF4C41')

#
escala = Scale(
    root,
    from_=0,
    to=10,
    length=200,
    orient=HORIZONTAL,command=app)
escala.place(relx=0.1,rely=0.75)
root.mainloop()