I wouldn't be surprised if blue at night were murderous if our eyes are indeed compenssting by adjusting towards higher blue sensitivity near dawn or dusk when there's not much blue in the incident light.
If you came to that conclusion on your own, I'd congratulate you on (possibly) being extremely perceptive, but also surprised that you weren't aware that it's already been widely reported in the past few years that, yes, blue light is apparently very bad news from the point of view of being sleep-inhibiting:-
Example story
Blue light presumably being far more of an issue in recent years due to (a) the increase in use of electronics and (b) the blue LED fad. (*)
I've seen an alarm clock with blue numbers- presumably because blue LEDs are cool!!!!!!11111- which struck me as an absolutely horrible idea. As did a ******* blue-coloured baby nightlight (because even baby deserves to be kept awake by fashionable blue LEDs. Sheesh.)
(*) FWIW, the blue LED fad seems to have died down in the past couple of years, and white LEDs are the new hotness. Which is a good thing from an aesthetic point of view (**) but I suspect those white LEDs still contain a lot of blue. Especially the more bluish-white ones which may well just be blue ones with phosphor coating (as some "white" LEDs apparently are).
(**) Nothing against blue LEDs as a concept, it's great that they were invented. What I hate is their gratuitous use- or rather, misuse- in consumer goods, both because they're overused and the novelty wore off long ago, but also because they're far more distracting in context than red ones ever were.