Theres a drastic color change in my screen. (it's a drastic change in the rectangle)
Pressure on the display that changes the display contents indicates physical failure of the delicate connectors where the glass meets the metal wires running to the controller. 

I would have an Apple certified tech let you know if it’s safe and get a quote to fix it. Unless there’s damage elsewhere internally, that sort of failure doesn’t damage other parts or represent a shock / fire risk vast majority of the time so you could opt to not repair it if you don’t feel the cost or time out of service matter to you. 

This likely won’t get better or fix itself, though.