For specific stories: In Good Hands is sunset-colored like the ending scene of the separation arc, Safekeeping is soft blue-gray, Hair's Breadth is the pastel easter-egg color of dawn.

For art: mijello mission gold indigo. i just love using it and making washes with it and looking at it; it ends up in almost every watercolor piece i paint, lol. mijello prussian blue and yellow ochre are also very good but their indigo is so moody and beautiful...idk i just love it