help with odin pls

i'm pulling my hair out right now, i have the samsung drivers installed, usb debugging enabled in developer mode, when i launch odin, the ID:COM section is blue at first when my phone is in standby but when i shut the phone down and put it into download mode the ID:COM turns blank, no blue, yellow green nothing and i can't flash anything to my device, what the hell is going on? been searching for hours to find solutions but nothing so far, getting frustrated, pls help.

using odin 3.07