title: How do I remove the light grey border around my Canvas widget?
body: <p>I've been messing with the Tkinter <code>Canvas</code> widget in order to see if I could make some aesthetically pleasing widgets, and I have a few questions. </p>
  
  <p>First, why is there a <em>light grey border</em> around my Canvas widget, and how do I get rid of it?</p>
  
  <p>Secondly, why is the top left most position in the Canvas (2,2)? It seems like it should be (0,0).</p>
  
  <p>My current script:  </p>
  
  <pre><code>from Tkinter import *
  
  master = Tk()
  master.configure(bg='black')
  master.wm_attributes("-topmost", 1)
  
  w = Canvas(master, width=150, height=40, bd=0,relief='ridge',)
  w.pack()
  
  color = 100
  x0 = 2
  y0 = 2
  x1 = 151
  y1 = 2
  
  while y0 &lt; 20 :
      r = color
      g = color
      b = color
      rgb = r, g, b
      Hex = '#%02x%02x%02x' % rgb
      w.create_line(x0, y0, x1, y1,fill=str(Hex), width=1)
      color = color - 2
      y0 = y0 + 1
      y1 = y1 + 1
  
  color = 10
  
  while y0 &lt; 40 :
      r = color
      g = color
      b = color
      rgb = r, g, b
      Hex = '#%02x%02x%02x' % rgb
      w.create_line(x0, y0, x1, y1,fill=str(Hex), width=1)
      color = color + 4
      y0 = y0 + 1
      y1 = y1 + 1
  
  mainloop()
  </code></pre>