Slightly Grey Greenish color on some of the grain, other areas growing healthy mycelium. Is this contaminated?

New grower here. Is this contaminated?

The purplish tint on the bottom of one of the pictures is just a reflection from a purple led light.

Snow-white area at the bottom is mycelium. But yes, the gray-greenish powdery patch is contamination. It will likely turn bright green or green-blue color within the next 24-72 hrs.

Unfortunately, there is no way to save it :(