Counteranecdatum for the author: I find your choice of foreground and background colors, syntax highlighting colors, font style and size, and line length inside your code blocks to be quite legible and pleasant to read.
Please make these sorts of choices again in the future!
I see your point about the larger fonts but I have used the sunburn theme for a while in my editor (not anymore thought in favor of slightly customized naquadah[1] ) and I feel quite a bit more comfortable reading code in familiar coloring.
I chose this color scheme because sunburn dark is quite popular.
Perhaps your color vision is now at the point where you should consider loading an accessibility stylesheet into your browser. I don't look forward to the day when I am required to do this, but I do know that it will inevitably arrive.
It seems that some of the stylesheets are broken for HTTPS. Note that this is not https-everywhere breaking the site; simply switch the URL to https://, and you will see what I see.
Please make these sorts of choices again in the future!