Solved! Can I use blue jack (line in) for my headphones?

Dec 12, 2018
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I wish to use another audio jack in for my headphones since I wish to use headphones and speakers at the same time.
Note: My front audio jacks are broken. So using the rear one.
My jacks are 3.5mm. (One is Blue,Green and pink).
i want to plug in my headphones in the blue. will it work? like, can i use headphone and speakers at the same time by doing this?
 
If your motherboard supports "surround sound" (these usually have five or six 3.5mm connectors), you may try connecting speakers to "front speakers" and headphones to "back speakers" connector.