Can I take a second’s pause here to point out how good a listener I think Greg is? Look at how intent he is. He’s waiting for Sherlock to finish his call, yeah, and he could look like that’s all he’s doing, but he’s really interested in hearing what Mrs. Hudson has to say. I love Greg.
Of course he’s interested - his entire wardrobe is black, white and grey. This convesation encourages him to be a bit braver and try a tartan scarf ;)
Also, fun fact, Lestrade has no idea what a color even fucking is. So there’s that.
Ahhh - so that’s why Sherlock has to scream “PINK!” at him…