I began my review of the eight Kaweco ink colors with Pearl Black, though Royal Blue was the first bottle I actually opened. Any manufacturer’s version of “ballpoint pen blue” is usually a safe bet - it’s like trying the crème brûlée at a new restaurant, or the pale ale at a new brewery. It’s a known quantity with minimal variables that provides an easy avenue for comparison. In my collection, Kaweco Royal Blue is most similar to Lamy Blue, but with a more intense color.
J. Herbin makes watercolor-lovely ink. Some colors, like Bleu Myosotis, give the impression that the viewer is looking at a field of wildflowers through a set of gauzy curtains in the pale light of a spring morning. Bleu Pervenche, on the other hand, places the viewer on a rocky outcropping, gazing out at the blue-green waters of the Mediterranean, one hand against the brow to shield his eyes, squinting in the summer sun.