I don't know which ones you have, I used ones like these
http://summitracing.com/parts/PRF-80202/ . They have a 3 mm and a 5 mm, I used the 3mm ones Got them at my local Radio Shack (they have red, amber and green, no blue though). Check your power and ground for that circuit. If I remember right, the turns signals were a light (left) and a dark (dark) blue wires off of the dash connector.
BTW, if you use a blue LED for the high beams, put it low and away from your main view, that thing is BRIGHT!!
Hope this helps you, if it doesn't let us know.