Hahaa. You caught me off-guard with that one.
Anyway, if I'm not mistaken you're using an "outset" with 2px for your bordering. Notice for each border the top and left are bluish in tone while the right and bottom are dark. I think the bluish color you're using is #0085AC but I could be wrong. With "outset" the right and bottom borders disappear into the background #10375D.