What blue is that?

It's varied a little in formulation as I've used it but in general I've settled on either 3:1 Talassar Blue Ultramarines Blue OR 1:1 Talassar Blue and Contrast Medium followed by 1:1 Talassar Blue and Ultramarines Blue OR straight up 2 thinned coats of Talassar Blue. The results are very similar.