Green one is for your headphones, pink one is for your mic. There are lots of other things to check besides plugging it in. You have to make sure your mic is set as the default recording device in Windows. You need to make sure the mic volume is set correctly. You need to make sure the mic is setup correctly in whatever application you are trying to use it with(Steam, Vent, games, etc). Either way, you have answered your own question. You have a pink 1/8" female jack which is where your mic plugs in.