Need more info:
Engine , plug heat range, application, useage?
They look a tad hot - but I see no glazed metals on the combustion shell face or glased GND strap which would indicate overly hot.
But, you seem to have moisture and evidence of corona discharge around the outer insulator.
They look pretty good other than they are probably one heat range too cold for your engine. The last pic you posted shows a good view of the grounding strap, and the point where the plating changes color should ideally be at the center of the strap bend.
If the point it changes is too close to the tip, the plug is too cold. Inversely, if the color changes closer to the threads you're running a plug that's too hot.