Cobalt Gloss is a deep shade at #2F55A8, cool-leaning. Dark colours show every ridge in the nail plate, so a ridge-filling base coat does more for the finish than the colour ever will.
A crème finish: flat, opaque and even, with no shimmer to hide behind. It is the most forgiving finish to apply and the least forgiving of bad prep.
It paints 2 designs in the catalogue, most often alongside Milk Glass and Midnight Cobalt.