Weird and distorted colors on the screen

Hello, 

I have an issue with my Macbook Pro a1706, since month ago my screen started showing weird distorted colors on the screen and i dont know what is the issue. At certain angle (almost closed mac) the problem dissapears. Is that dustgate issue or something else that needs change to the screen. I will add photos of the mac and external monitor to show the difference.

Have a great weekend!