Hello. I have unscrewed the kitchen light and am trying to replace it with another. Basically, a blue and a black wire were connected together, a yellow and green cased wire was in the middle and a yellow wire was the 3rd. My problem is which wire is live and which is neutral? I would be grateful for some help.
Thank you

Normally green is ground. Black is hot. Which would leave yellow for neutral.

Chuck

Voltage testers are very inexpensive and colorblind like electricity...
A small price to take away the guess work...

Those are somewhat strange wire colors to see in a house. Where are you located? Is this an old loft apartment? Harbor Freight has VOM testers for $5. Neon testers are even less.