Is there a mod that makes laser weaponry shoot invisible beams? Lasers don't work like that!
Weaponized lasers most certainly do have colors.
In the real world, Industrial lasers are colorless in some cases, although there are indeed colored ones.
I studied lasers for a while in college as a hobby, even got access to the tech labs where they work with them and I found out a lot of things:
1. Laser emission by itself is an excited beam of photons and thus, has an emmissive radiation spectrum based on the frequency of the laser.
2. The frequency of a laser emission corresponds to a frequency of radiation ranging from low-band EM all the way to (and potentially beyond) Microwave.
3. 'colored' lasers fall within a specific range of photonic radiation emission, and the guiding factor is, traditionally, the refractive element(s) used to focus the laser, such as a rod of manmade ruby.
4. Various 'spectrum' (color, if you will, although many 'colors' of laser are invisible to the unaided eye) lasers have varying penetration potential for physical objects. To whit, some lasers will cut through any known substance in the universe, while other lasers are easily reflected by various properties, the most common of which is, of course, the refractive potential of the target ('mirroring'..aka 'shininess').
In the case of cutting lasers (as opposed to communications lasers, etc), the cutting ability is determined BOTH by the wavelength, AND by the intensity (power) of the beam. Due to this, lasers are measured with Wattage, traditionally, as the Watt system can obtain to the huge numbers involved (Gigawatts, Terrawats, etc).
What does #4 actually MEAN?
Well, doctors and industrialists use various 'colors' of lasers to cut various objects. One 'color' of laser is less prone to break up due to refraction, and is used on items that have a tendency to have a 'sheen' or 'shine' to them (such as diamond), although those items still need to be prepped with an anti-reflective coating, generally, such as a dusting of pot-ash or other substance.
Some lasers will cut ONLY skin, while others will cut ONLY a cornea, still others will only cut 'red meat' and yet another will only cut bone.
Ok, class dismissed
I left out a lot of specific information for brevity, but if necessary, I can quote you chapter and verse from a number of physics textbooks
To answer your question, however: No, I find no invisible lasers on the Nexus or other sites to date. Why don't you create one for us?