The theme is too bright and nothing is read !

[muhammedkaraoglu]

What I see on the computer :

Photo in Github Repo :

After installing the theme on my computer, my eyes were blinded. Please excuse me, I wonder if I am doing something wrong, why am I faced with such an image. By the way, I don't want you to think of the picture as a comparison between html, Haskell Script because this bright image is the same in all my files. (.js, .css, .html, .py, .php etc.) I would be very grateful if you can help me.