I am not saying that this is not 'Lavender Heartthrob', but it does not look lavender and the sepals do not look lighter in color like the other photos. It stands out from the other photos, but sometimes that is just how it is.
Name: Suzanne/Sue Sebastopol, CA (Zone 9a) Sunset Zone 15
The caption does say "cloudy weather' which can tend to make for deeper colors, I know it does for me. The throat color and pattern and the light midribs do match.