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So you may or may not see that the background color "behind" the text (including the linum) is lighter (#20292D) than the window's background color (#20282C).

Please note that the background color set in my theme is the latter, #20282C, as seen here.

My question is, what is causing the text to have a lighter background color and how can I make it to be the same as the window's color?

1 Answer 1


Put your cursor on a character in the text, and hit C-u C-x =. That will tell you what face, if any, is used at that position.

Then click that face name in buffer *Help* (or use M-x customize-face) to look at the definition of that face. Probably it specifies a background, and that background color is similar to but not quite the same as the background color of the frame.

You can check the background color of the frame by M-x pp-eval-expression RET (frame-parameters) RET - look for background-color.

Use M-x customize-face to remove the background attribute from the face (or make it the same as the background of face default, which is used for the frame, including non-text areas).

  • With C-u C-x = I found out that the background color of the text is correct, while the color of the frame itself is a bit darker. After further investigation, I discovered that I am affected by this bug. Thanks anyway
    – tudor
    Commented May 30, 2017 at 8:25
  • Interesting. I guess you can set the face to whatever color you want, but because of a GTK bug you cannot set the frame background to the same color.
    – Drew
    Commented May 30, 2017 at 14:17

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