Speaker wire blue?

Hi.
Im taking apart a bluetooth headset for a project and i need to extend the speaker wires. however the speaker wires are red black and blue?

why blue? whats the blue wire for? why would they need to connect blue wire to a speaker?

yes. good idea.
well its a jabra BT2046 bluetooth headset.
the mic in onboard beneath(compared to picture)
and like i said there are 3 wires connected to the speaker. red,black and blue.

and i need to extend those wires but i dont have a blue wire. i dont know what kind of wire it is. unless every blue wire in the universe is a N-wire thingy. then i may possibly know.
but could i just extend the black and red and disconnect the blue wire? would it work the same?

the wire on the board from the left to right are black -blue -red. so the red wire connects in the right side. if it matters.

It is probably a shielded cable. This is rather specific, and not a product we carry, so perhaps posting more information and pictures will get you better answers from the community.