Of course he can change the source code or the picture, but why?
By the way,
look at this
According to the source, there are 4 classes: complete, complete_lot, notComplete and notComplete_lot.
complete is more pale then others (#99bee8 vs #5591d9).
notComplete is bold while others are normal.
complete and notComplete has 9pt font while others has 7.5pt.
So, I think, everyone has the same effect... Except for ones who have cached css
