How long did you take to realize the picture is in black and white?
My brain sees it in colours that it is used to seeing: variable types are in indigo, and numbers are in turquoise. What about you? I am also interested whether this phenomenon is somehow connected with experience on Codeforces and/or this color scheme, i.e. are people having less experience with CF/CodeBlocks/white color schemes seeing black&white right away?