This tattoo ink color reflects the rich blue color shades of Japanese kimonos. It heals with more bluish than reddish touch, and has been used by Japanese grand masters to create the dark shades of the underbelly and dark ridge of a dragon's back. When tattooed, the color tattoo ink goes in slightly darker and changes its hue from blackish blue to a perfectly balanced blue (about 20% lighter as it appears).

All dragon colors can be seen on Mario Barth's back and are designed and specially mixed by Horitoshi I.