Vibrato is a bright blue shade, really vibrant and similar to Dior Sailor (but no exact dupe).
Pigmentation is brilliant! One coat, and it is quite opaque. With two coats, as shown below, it’s perfect. I also liked how smoothly Vibrato applied, as well as its drying time. Capturing its brightness in photos, however, is tricky – same as with Sailor. I tried hard and ended up with my mobile (actually, Vibrato is still a tad darker than shown in the pictures).