Disarray Clipping question

[mad5066]

Just got done finishing the build, sounds great! I was wondering is the blue led suppose to light up? Mine doesn't and looking at the schematic, maybe the blue LED is backwards? I used 1N4148 in series with the blue. sounds great regardless but I was just curious.

 

[mad5066]

Installed it backwards based on the schematic without thinking. It should be installed in the opposite direction as the other 2 diodes in series. Lights up very bright.