White chocolate melting wafers, white candy melts, or white confectionery coating melt down smooth and glossy, and blue spirulina powder turns them into the kind of deep ocean blue you usually only ...

Two drops of gel into a bowl of white frosting and you have the shade of a deep summer sky. A teaspoon of blue spirulina powder into a second bowl and you have the soft, dusty teal of seaglass. Same ...