NEW Cobalt Blue Deep - HOT SellerSpecialty customized oil paints by Robert Doak Best Quality Oil Paints used by famous artists worldwide HOT SELLER A NEW Cobalt Blue Dark Pigment has emerged. I have developed it with a chemist, and the result is a darker and more brilliant Cobalt Blue. There is nothing else like it anywhere! No ultramarine, thalo or Indanthrone in it. It stands alone by itself. I have been searching for this color all my life!