Canvas(and/or labelframe) background, odd gray color
<p>Im having a hard time figuring out where a grey color is comming from, first a picture to illustrate:</p>

<p><img src="http://i.stack.imgur.com/p879A.png" alt="The picture"></p>

<p>As you can see i have drawn 3 arrows which (i know it is a bit hard to see) show the grey outline.</p>

<p>My code goes:</p>

<pre><code>master = Tk()
master.title("Skrå kast")
master.resizable(width = FALSE, height = FALSE)
w = Canvas(master, width=630, height=598, bg="#FFFFFF")
w.grid(row = 1, column = 2)

#...

labelframe = LabelFrame(master, text = "Parametre for affyring", background = '#FFFFFF', bd = 3, font = ("Aeria", "8", "bold"))
labelframe.grid(row = 1, column = 1, ipady = 217, ipadx = 2, padx = 3, pady= 2, sticky = N)

#...

w.create_rectangle(10, 4, 630, 596, fill = "#ffffff", outline = "#000000")
w.create_text(320, 30, text = "Simulering af skud med kugle", fill = "#000000", font = ("Arial", "20", "bold"))
</code></pre>

<p>Where on earth is that grey outline comming from?</p>

<p>I suspect it is the labelframe, however i have not been able to find a way to get rid of it. Not even tampering with the paddings work.</p>

<p>I hope you can help me :-)</p>

<p>In advance, thanks!</p>

<p>Casper</p>
