For dimly-lit environments, the human eye's peak sensitivity for scoptopic vision is around 498nm (https://en.wikipedia.org/wiki/Scotopic_vision) which is blueish-green.
They should have more than enough brightness to be clearly visible in those light conditions on almost any visible wavelength they chose for the laser, so it's weird if they optimize for this instead of the outdoor performance.
However, apparently I'm the idiot because red, not blue is hardest to see due to various reasons. At night we are all but blind to it.