No, fair point (given my initial comment - but that comment of mine was in comparison with S. meyreckii initially) I looked very carefully at the markings. Looking at tha inaturalist S. emmetropis images, there are brownish as well as grey examples there. Note: I have only seen the species once in my garden so far.
Sorry I meant to say iiNaturalist, not the ALA. There are brown examples as welll as grey ones here:- https://www.inaturalist.org/observations?place_id=6744&taxon_id=892878 For example: https://www.inaturalist.org/observations/41876421 and also: https://www.inaturalist.org/observations/25665827