What gives with the colors on my buttons?

Below is a screen shot of my screen in my project. Note the color of both the non-red buttons. One button (on the Left), was left with the default color. The button selected and properties showing, had the color changed at one time. The quandary is, that when I look at the properties of the left button (default color), it shows the exact same color. Note that the Left button has a two-tone grey color, but the other button has a solid grey background despite both buttons show the exact same background color ("ButtonFace") in properties albeit the middle button's property, "ButtonFace" is in bold in the properties window. To make it short, how do I get the middle button back to the ButtonFace default, two-tone Grey color?

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