A red laser is the lowest risk and were the first developed.
The green laser is mostly used in attacks. A green laser is about 60 times brighter than red. It can cause flash blindness at lower levels but is mostly a distraction particularly at critical phases of flight.
A blue laser is not legally available and should be avoided at all costs. At close range it can cause irreversible retina damage. It can burn through clothes and skin!
Well that's what a brief I received told me!
what you where briefed on is spot on, unfortunity there are a great number of utube videos telling and showing you how to build blue lasers from parts of old computer and console parts, some of the lasers are quite powerful.
with a little bit of work you could replace the leds in a large touch with bluray diodes and create a nasty bit of kit.
fats