well, tetryon/plasma weapons have more of a bluish hue to them, basically each weapon type has a different color to help distinguish it from another. as for pink, i dont know, i just know jem'hadar ships shoot purple. >>
If the blue weapons fires coming from a classic connie... then its likely a gamestop employee who cheated and got his copy early since they work there. >>
there is this thing called the search button. If you would of used it for SEARCH for different color of weapons. you would notice that there a command to change your weapon color in game. So please everyone let see if people can search before they post.