It's funny how over saturated that green is on my phone's OLED screen vs my desktop's LCD. The green is retro on my desktop my very not retro on my phone. It is supposed to be a subdued retro green not the overly saturated color that mobile makes it out to be!
The blue comes across truest to my vision on both LCD and OLED displays.
Since most of the actual text is not "white on dark", but "dark on blue", it's very readable.
The blue version is fine. The best of all 3 by a large margin
The amber version signals me that I should stop looking at it eventually, though I hang on for a while
The green version hurts my eyes. I want to leave as soon as possible
I think the green is brighter to me than the amber and, on top of that, the black text on green background somehow also gets hard to read.
So you definitely made the right choice going with that default!