Hi,
get Pixel color works with x and y being local coordinate of your texture, it has nothing to do with where it is on screen basically, I think this is where you are getting confused.
So do a raycast from your mouse position, and then use another custom action ( on the Ecosystem, called
GetRaycastHitInfoExtrasHave a go, and let me know if you still struggle with it, I'll do a working sample.
Bye,
Jean