title: Changing the appearance of a Scrollbar in tkinter (using ttk styles)
body: <p>I was wondering if you could help me with a  style options issue in ttk. I've managed to change most of the basic ttk widgets to the style of my preference. I'm only stuck at changing the style of a scrollbar. I've searched for hours looking for an answer, unfortunately to no avail. </p>
  
  <p>Here's a sample code using the scrollbar style option:</p>
  
  <pre><code>import tkinter as tk                 
  from tkinter import ttk
  
  class Gui:
      def __init__(self,mainframe):
  
          #set the style
          style = ttk.Style()
          style.configure('Horizontal.TScrollbar',background = "blue" )   
  
          #Create a mainframe
          self.mainframe = mainframe
          self.mainframe.title("example")
  
  
          #creating scrollbar frame
          scrl_attr_frame = ttk.Frame(self.mainframe)                            
          scrl_attr_frame.grid(column=0,row=5,sticky="ns")                                           
          scrl_attr_frame.rowconfigure(0, weight=1)                                                   
          attr_canvas = tk.Canvas(scrl_attr_frame)                                                   
          h_scroll = ttk.Scrollbar(scrl_attr_frame,orient="horizontal", command=attr_canvas.xview)
          attr_canvas.configure(xscrollcommand=h_scroll.set)                                       
          attr_canvas.grid(column=0,row=0,sticky="ns")                                                                            
          h_scroll.grid(column=0, row=1,sticky="we") 
          attr_frame = ttk.Frame(attr_canvas)                                                        
          attr_frame.grid(column=0,row=0,sticky="ns")                                                 
          attr_canvas.create_window((0,0),window=attr_frame, anchor='nw')
          attr_frame.bind("&lt;Configure&gt;",lambda event, canvas=attr_canvas : canvas.configure(scrollregion=canvas.bbox("all"),width=200,height=200,takefocus=False,highlightthickness=0))#attribute_frame.winfo_height()/20,highlightthickness=0))
  
          #setup treeview widget
          tree_columns = ("c1", "c2", "c3")
  
          self.tree = ttk.Treeview(attr_frame,columns=tree_columns, show="headings",takefocus=False)
          self.tree.grid(column=0, row=0, sticky='nsew')
  
          for head in tree_columns:
              self.tree.heading(head,text=head,anchor="w")
  
  
  root = tk.Tk()
  myapp = Gui(root)
  root.mainloop()
  </code></pre>
  
  <p>I also tried several combinations including;</p>
  
  <pre><code>style.configure('TScrollbar',background='blue') 
  
  #and
  style.configure('CustomScroll.Horizontal.TScrollbar',background='blue')
  
  #in combination with
  h_scroll = ttk.Scrollbar(scrl_attr_frame,orient="horizontal", command=attr_canvas.xview)
  h_scroll['style'] = "CustomScroll.Horizontal.TScrollbar" 
  </code></pre>
  
  <p>Many thanks for your help! </p>