Each technology level has its own laser color but you can override the color in the settings.
The damage and attackspeed is also affected by laser tower upgrades.
Also check out my Laser Tanks Mod

Credits:
Gun sound by mike koenig http://soundbible.com/1774-Laser-Machine-Gun.html
Weapon graphic by Mohammad Reza Fathian @ideasone https://www.pexels.com/photo/1117377/
Russian localization by Va7ya

My mods:
Combat:
- Blood & Gore
- Raven mk2
- Shield FX
- Laser Tanks
- Laser Rifle

Basing:
- Wind Turbines
- Vehicle Physics

Deprecated:
Combat:
- Turret Shields
- Railgun Revival
- Desert Eagle
- Wave Defense Unlimited
- Universal Turret
- DotA
- Glowing Laser Beams -> Updated version by Pikachar
- RPG Items -> Updated version by ZwerOxotnik
- Spell Pack -> Updated version by ZwerOxotnik
- Hovercrafts in collaboration with Arcani

Basing:
- Realistic Reactors in collaboration with IngoKnieto
- Realistic Reactors - Utilities
- Overloaded Trains
- Resource Spawning Ingame
- Transformers
- Speaker Signals Expansion
- Solar Panel Equipment
- 0.16 Graphics
- Unlushed Trees
- Bleached Trees
- Copy&Paste for 0.16
- Lua Combinator 2
- Lua Combinator 3
- Fire Department
- Robot Tree Farm
- Modder's Science Pack
- Assembling Machine Equipment
- Bottled Science
- Heat Glow
- Market
- Market - AutoBuy